Is there any way to run plumbing to the separate vanity area to make it into a sink? We are doing a gut remodel of our bathroom and we were able to cram in the shower, 5'6" claw foot tub, toilet and two sinks (on adjacent walls though, not next to each other) in a slightly less than 10'x11' space including sloped ceilings and a couple of windows. Here is an older version of our plan for the bathroom but shows the two sinks. The one next to the tub is a console sink (on chrome legs) so very open and the tub is now a double ended tub with plumbing in the middle. Here is a newer plan showing a tile layout I was messing with and the right tub. It also shows a bump out for a knee wall where the new drain is going to run - it turns out there was steel angle along that wall and we could not run the drain line under it so had to go through. It's more of a challenge to get the water there but wasn't impossible.

Do you have grand-kids, or are you expecting any near your guest bedrooms? If so, do consider having tubs (at least a small 5 foot inexpensive one) for baths. You won't regret that, especially for resale. As for your Master Bath, ask a realtor friend and they will likely tell you it's 'best' for re-sale for a 5-piece Master too, but if you'd much rather have the extra-large shower than a smaller shower and tub, then go for the larger shower and forget the tub. We have an oversized shower (dual heads, etc) and absolutely love it. We have a big jacuzzi tub too and it's nice but doesn't get a whole lot of use. Our overall bathroom is quite large, but if I were limited on space, the tub would be the first to go or at least downsize. As you age, you will probably find a better use for a walk-in shower with things you can add in your later remodel (hand-held rails, bench, etc) than a tub that is hard to step into.

I personnaly like a thincker strip like in the first picture... especially if you have 70" to work with :) good luck!

How imminent is possible resale? What are typical buyers' family make-ups in your area? Are no-tub homes common in your area? Is it a buyers' or sellers' market? Unless resale is in under 5 years, average age of kids in the neighbourhood is under 10, everyone has tubs, and it's a buyer's market, which is an unlikely combo, LOSE the tub. Too many people hang on to them because it's believed we 'should'. A good walk-in shower with a built-in seat and large enough for a wheelchair is far more versatile and practical. It's not just stepping over the tub rim that makes people want to get rid of them. Tubs are far smaller, often messier, & less commfortable overall. And you have an outdoors one for the luxury aspect. We need to LIVE in our homes fully, not under the shadows preceeding future owners :)