Hilary I can respond to some of your questions about a handicaped bathroom. Three years ago I had one put in. I also was expanding my family room so I went thru major changes. What you have to be aware of a handicaped bathroom has certain room size specifications. I don't know if this is from osha or local ordinaces. I have a handicaped shower. It has a fold down seat. The water is controled by one faucet. It is on a bar that slides up and down and the shower head is on a hook. the room itself has a floor of ceramic tile. There is a new cement board that is out now that should be used for the floor, instead of plywood. You should also have a floor drain outside the shower too. The showeris almost flush with the floor so water will get out. A good general contractor should do it . The price I don't know. IThe shower price can be checked at Home Depot.. It will be about $1000. It most probably will have to be ordered. My contractor had to subcontract the plumming. If it wasn't for the handicaped he would have done it by himself. Good Luck... I am glad I put mine in. It was a big sacrifice and I know that I will not get my money back when I sell the house. I don't anticipate selling it for many years. Bud Harrington