So as it turns out you are correct, the transoms do separate from the window units. Our builder told us the cost to tear apart/reassemble the units would cost more in labor than a whole new unit. I'm fighting for a cost breakdown now. The cost for three new window units was about $8200 (labor + materials). They are charging us $2K for a full day labor even though it is a half day job because the framers have to come back with a special machine. I'm fighting this labor charge too. We decided to just replace the two windows in the sunroom (same transom, just 6' window unit instead of 5' window unit, making the overall window opening 7'). The cost to only replace 3 windows is $5900. I'm not thrilled and I'm hoping that fighting for the reuse of the transoms and the labor charges will bring us down a bit more. In the grand scheme of things this is a small charge in terms of what we're already spending and the look in that sunroom would eat at me forever if I didn't fix it. But I'm angry that the mistake should have been avoided (and therefore already paid for through our mortgage allotment). You live and you learn. Thank you for all of the advice and feedback.

Awning type windows are often combined with other windows so to accommodate that installation without making another window model, all 4 sides are usually treated the same. The standard jamb depth of the Integrity awning window is 4 9/16" so to install it in a wall with larger than 2x4 studs Marvin offers extension jambs. The extension jambs have a hidden rabbet that forces the trim to be placed as your carpenter has installed them. What he did differently from the standard Marvin detail is to use a projecting "stool" trim at the bottom instead of using extension trim on all 4 sides. He chose to position it the same as the other 3 sides so it would match. To do otherwise without creating an unattractive groove would require making a stool trim that would extend over the frame to the sash stop with a cutout for the operating hardware which would provide a smooth traditional stool. This is not a detail a carpenter would be likely to assume you wanted because it is considerably more expensive and "non-standard" in today's market. The reveal for the Integrity Awning is small. On the Marvin Ultimate Awning it is about 5/8". The detail on the Ultimate Double-Hung still allows a traditional stool.

I know someone who had a very small kitchen with a few feet of continuous counter to the Left of the sink, but the cooktop was to the right of the sink and there was 9" of counter between the sink and cooktop. They almost always completely ignored the feet of countertop to the left of the sink and prepped on the 9" of countertop between the sink and stove, sometimes balancing a cutting board there to make a little more surface to work on. It's just human nature that people want to prep in certain spots and it doesn't really matter if there are yards of counterspace somewhere else (unless you have a baking area or a countertop appliance area there). So I agree that that run of counter on the far side of the sink will probably just accumulate things.

@BeverlyFLADeziner Thank you- I knew something bothered me about the room the way they staged it to sell but I could not figure out what it was. I appreciate all the comments and ideas! I had thought of possibly adding beams in here to the ceiling! I’m trying to figure out the best shape/style of chandelier for this room. The foyer/entry light, a more wide/beefy one where they have the dining room table (but hung higher so we can walk under it as we won’t have a table under it), and I will need to coordinate with a new dining table light fixture in the kitchen/dining area that is visible from this room. I think a dark finish would look best. Front door faces to the west I believe but window is somewhat shaded from a tree/shrub in the front yard. This room will be our music room/library/company visiting room. I have a couch I will center between the two square windows as part of the seating area. I have several tall bookcases I would like work into this room (one is shown in photos of our current living room)- they all match. I plan on removing the staged dining table and putting our piano on the wall where the dining area is located currently and using the area for our music stand and string instruments, sheet music/books.