I realized after I posted that I just added more issues to think about; but you are correct there are tons of info and misinfo out there about floors in general. Nail polish remover is acetone, and what you removed was probably old-fashioned varnish which I think is soluble in acetone. I'm not sure acetone dissolves shellac - alcohol does that. It's not un common to have multiple different types of old finishes, for various reasons, (You might try some denatured alcohol, or vodka. I use grain alcohol which is the nuts, though sometimes hard to obtain because of laws trying to prevent people from misusing it. I actually have to leave NY and buy mine in VT, by preorder from a State source.) The cracks you see in August (and still now) are likely the narrow ones! Wait until late March rolls around after a full winter of heating. I can lose Bic pens in some of mine. That's when they are easiest to clean out, though. I wouldn't try anything other than emergency washing until the cracks are clean as there is no point moistening that junk in there. It's important that at the end of the season that the gaps are clean as they begin to swell back up. Dirt and debris trapped in the cracks as they close can compress the edges of the floor board, causing increasing gaps the next season. Of course old houses weren't built when there were effective vacuum cleaners so there's a lot of debris down there. As to washing: Murphy's has long been a standby, but has also acquired some (perhaps innaccurate) reputation as being hard to fully remove from floors prior to using poly urethane finishes. I will say this: about a decade ago I was visiting Montpelier, Pres. James Madison's plantation, (he was comtemporary pal of Thos. Jefferson) in VA. I happened to be visiting in the off season and got to wander around a bit more than most visitors. I climbed a staircase and encountered the curatorial staff working on an as-yet-unopened-to-the-public room. They were busily at work washing the floor of the room, with you guessed it: Murphy's and water. So if it's good enough for such an important and professionally cared-for house, it's probably good enough for mine. Otherwise I use Organic Linseed Oil Soap - imported from Sweden, doncha know. I got it from the site that sells the Silent Paint Remover. I find it's an excellent cleaner, smells nice and wasn't particularly expensive since I only use a little at a time. In olden days the floors were sometimes washed with lye, leached out of wood ashes, so I imagine a little Murphy's or Method won't hurt. Floors were also strewn with sand which was then swept up. (That's why you'll likely encounter sand in the cracks even if you're far from the beach.) Don't try washing unless you have a huge pile of rags on had to handdry the floor off at once. Yes, hand sanding or scraping is a one-room-at-a-time type project. More so than renting a drum sander. The only catch is how to meld the meeting point of applied finishes at the threshold when the adjacent rooms are not done all at once, if you don't have a raised threshold. One of the beauties of shellac is that it can be patched up or touched up, or joined together seamlessly anywhere, even in the middle of board in the middle of a room. It's not without its detractions however, the primary one being that it is not bulletproof the way modern poly is. OTOH, should trouble ensue you just clean the surface where the problem is of any wax and dirt and get out a brush and touch it up. It redissolves the old shellac, mixing it with the newly applied stuff and dries so the patch is invisible. Can't say that about any poly finish. You can get it completely off with rags and alcohol and start the whole thing anew if you want. The fix-ability and the reverse-ability have much to recommend it. It is also pretty easily DIY-ish, and cheap. You can search for more info using Google and here on thsi site. But be forewarned there is a LOT of anti-shellac prejudice out there by floor pros, and some people who are just repeating what someone else said. There are also some excellent reports by people who took the chance on it and are very happy. It is relatively slower to apply and more hands and kness sort of work. Don't try it unless you are in a warm-ish, but mostly unhumid time of year. You need to ventilate the room. It is not the worst stuff for breathing, but not benign either. Shellac itself (though not the carrier) is an organic product made from exudations of a beetle in India. I'm imagining you might be interested in seeing what can be learned from your floors. Here are two things to look for (get down on your knees with a good flashlight.) Look for little rows of holes running along the floor. The holes will probably close be together but the rows separated by about 21-27 inches apart. This is evidence of an early floor covering called ingrain carpet held down by tacks. Another thing to look for is evidence how the floor was finished originally (and to know if it has ever been sanded by modern methods). Drum and orbital sanders didn't exist, even sand paper as we know it didn't, so very sharp broadknives were used to scrape the floor flat and ready for finishing. If you hold a light at a raking angle in a place where the wouldn't have been much foot traffic, you may be able to see shallow 1/16th to 3/16 ths inch wide grooves on the surface. This are the still-remaining toolmarks of the original floor's finishing, you are looking at the hand-made work of the floor installer. If you can see the undersides of the boads, say y looking up at the first floor from the cellar, you may be able to see the saw pattern, which can tell you if it was made from logs using a hand-powered pit saw, circular saw, etc. This helps nail down the age of the building because of technology of locally available materials is often known pretty accurately. Have you sorted out which floors are the splintery-est? I have some fir and it has narrow, sharp, fierce splinters. The flat-sawn wide-board pine pretty mellow. Quarter-sawn oak strip is rarely that way. It's not uncommon to find many types of wood in a single house. It's worth learning the correct indentifications of both species and board type (flat, quarter, radial, T&G, butted, lapped, etc.) as sometimes choices of floor finishing techniques are limited by type of wood. Oh, I forgot to add: the reason I use old credit cards (and similar plastic things) to clean out cracks is that the edges and rounded corners are less damaging to the board sides within the groove than metal implements. Plus all the credit cards that are expired get another round of use if recycled into my floor tool box. Card companies used to send out plastic versions of fake ones they use to try and get you to apply for them. I was in plastic tool heaven, but, alas now the facsimiles are just cardboard. Another solvent to try is Soygel. It is particularly, though slowly, useful on floors. Leave it covered with plastic wrap for days, if necessary. Let time do the work, rather scraping it yourself. It also cleans up nicely which is something you can't say about most chemical strippers. All these solvents and the rags used to apply and clean off have the potential for spontaneous combustion. Either air them out on a line for days or dispose of them in a metal, closed container filled with water, and kept outside away from the house. HTH(elps) more than just adding to the overload. L. Here is a link that might be useful: source of Excellent Technical on Info on Care of Old Buildings (NPS Preserv. Briefs)

Here is what I think is going to play out best for you if you are going to be in the house long enough and will heat primarily with wood. Keep in mind that I am an amateur with absolutely no experience in duct systems. I decommissioned mine at the first opportunity and installed mini splits. I'll gladly accept all criticism from anyone that actually knows something. Berto, you've already said that you are going to have ducted AC, (I'd look at mini-split heat pumps, but that is me and I don't have the time to split wood.) It ought to be pretty simple to make a dual furnace system with a wood furnace first in series with the (second) propane or electric furnace. Your thermostat turns on the AHU blower (for me, ideally, a variable speed blower with a proportional thermostat). If the wood boiler is supplying sufficient heat the secondary furnace does not run. If the duct temp between the furnaces falls below a set temp (which might slide depending on outdoor temperature) the secondary furnace fires up. If the day comes that you tire of cutting and splitting wood, you pull out the cheap furnace and put in a mod con furnace. It is no biggie to toss that first furnace because it was inexpensive to start with. The duct system has to be designed to support both heat sources and cooling. The furnace that you choose will have to be just good enough to run a cooling system well which might be more costly than the least expensive that you might use for (back up) heating alone. Keep in mind that a (complicated) super efficient furnace or boiler is not going to be a good investment in a well-insulated and sealed house that is primarily heated with wood. The ROI time will look like infinity.

Without a water source, prepping on an island or peninsula usually doesn't happen much - no matter what you "plan". In my old Kitchen, I had a 36" piece of counter that was not near the sink that I never used and, instead, used the 24" b/w the sink and range. I needed water to prep and it was much easier to stick to the 24" of counter than to keep moving things back & forth. We have heard similar stories over and over here. . Regarding barrier islands not being in the way - yes, they are. *** Warning - what I am about to say may offend some people. I don't mean to offend, but I want to be sure others reading this understand. *** Some people won't admit it's an issue running around an island or maybe they don't realize how much they're running around the island until they take the island out. My SIL always told me that she was OK with a barrier island - UNTIL she remodeled. She took out the island (with no sink) and intended to put another one in later - but she finally admitted to me that she would much rather have a lot of open floor space than put an island back in. She didn't want to admit originally that she had made a mistake (so typical of us humans!), but now is willing to admit it and says there is no way an island is going back! She is so happy that she doesn't have to run around that island over and over - and it really wasn't all that big an island - only 42"W x 35"D. BTW...she doesn't have much prep space b/w the range & sink, but always used it anyway b/c, like me, it was easier than moving things back & forth. I think she has about 18" b/w the sink & corner and another 18" b/w the range and corner - that's it. Even when she had the island it was much easier to use the counter b/w the sink and range. I couldn't talk her out of having the sink under the window - that's why she as so little prep space in the remodeled Kitchen. :-(

@Sunshyne "I've heard that off gassing continues even after it's cured... that's why I'm so against it. I could deal with it during the application and drying process but to think it off gasses for years after is concerning." We all "hear" lots of things. That does not make them true. You need to do your own research to be completely sure of your decision. Something happened to my immune system way back in 1983, long before many people were talking about these issues as much as today. At that time, I had to find my own answers. I ended up eliminating ANYTHING and EVERYTHING from my environment that was "scented". What I found was that most "scented" products are made with a by-product of petroleum - as in CHEAP! Or at least, petroleum is the "carrier". To this day, I am still extremely sensitive to that. I don't even walk down the detergent/cleaning aisles in the grocery store! I get an instant headache if I'm around anyone who has used dryer sheets. SO, this is why I researched and found Rubio. But in the end, it has not been worth it. As I said earlier - a NIGHTMARE to keep clean - but as with anything - it will depend on your standard of "clean". Waterborne products (paint, clear coats, stains, etc.) have been produced in response to the need for "safer, more responsible" choices for health & environment. During our remodel, anything that has the potential of "off gassing" has been left outside for as long as possible - including carpeting. Honestly, I have more trouble when I purchase an area rug getting the smell to go away.