I found out that there is a gap between the tile and tub that would be too big for caulk. It's one of those things where in the grand scheme of things, it isn't worth a battle - especially since the way the designer laid out the tiles in the design there would have been a gap ... plus the designer originally had shoe molding around all the baseboard. It's one of those details I didn't really look at until the tile was already installed. Now that I see the bathtub without all the construction materials in it and decided to go with the baseboard without shoemolding, I can live with what we have. Weedyacres, I really like the quarter round you have - it looks very natural with the bathroom. Thanks. It makes me feel better to see that this isn't that unusual.

Yes, the plumbing needs to be done first. Yes, you may be able to just get another acrylic shower wall to cover over everything, if the wall is not moldy or wet behind the tile that you are looking at. There is no need to replace the tub itself if it is in good shape, even if you do decide to take down the wall tile and replace everything from the studs out. Just make sure the workers cover the tub well to protect it while the work is being done. I am with Monicakm_gw, get some more bids for the work. You might want to have them bid on just replacing the walls with new fiberglass, and on doing the whole new tile job, too. You can see new walls at Lowes, Home Depot, and Menard's online. There is also the whole Marbleite wall option to look into. Local dealers for Marbelite are supposed to be cheaper than buying from big box stores, if I remember right. While you are fixing plumbing, you should probably put in a proper mixing valve to protect from scalds. It is the code now. No one will be able to turn the water too hot to burn themselves and flushing the toilet or using the water elsewhere in the house will not burn the person in the shower anymore, either. I have read the experts here on the forum say that the Symmons Temptrol system is very good and is a good value. Here is one that comes with the shower head and tub spout for under $100. http://www.homedepot.com/p/Symmons-Temptrol-1-Handle-Tub-and-Shower-Faucet-in-Chrome-S-96-2/100643619

I"m short on time, but wanted to post something that's been swirling in my brain. I think walk in closets are lovely if you have the space, but I just don't think you have the space; I'm pretty confident that the minimum recommended width of a closet is 5'. How about a walk- through closet to your bathroom? My guesstimate is that you could have 6' wide, reach in closets on either side of a 42" hallway. I've seen lots of pictures with a beautiful tub centered under a window and flanked by vanities, so I appreciate that look might be a priority to you. I just moved all that over to the other window. I tucked the toilet and shower around the corner. Depending on the location of the window, you might be able to have a pocket door, but if not, a wall would add a lot of privacy (avoid seeing the reflection of someone on the toilet from the entrance or the rest of the bathroom.) Anyhoo. Here's a rough drawing. If aging in place is a concern, I'd put the shower and toilet on the exterior or bedroom wall, so you have the option of creating a quicker route to the toilet (through the closet wall) in the future.

i have one and i just use a clear curtain on the inside. Theres a great one on amazon designed for clawfoot tubs with magnets at the bottom that work. love it and no worries about splashing over that part because i just over lap the curtain and they stay with the magnets. i have drywall around my tub so i have to make sure it deosnt get wet lol https://www.amazon.com/Mrs-Awesome-Bathtub-Water-Proof-Plain-Design-180/dp/B07RHDNSJJ/ref=sr_1_5?crid=2GPBNR5XZ2IYE&keywords=clawfoot%2Btub%2Bshower%2Bcurtain%2Bliner&qid=1649950071&sprefix=clawfoot%2Btub%2Bshower%2B%2Caps%2C72&sr=8-5&th=1