Hi Leisa,
I've been putting together cat info for elder homes for a while. Here are few ideas and some links where you can find them. You many have to cut and paste the links. (By the way, I'm not affiliated with this company, just like their products.)
A self-cleaning litter box is more expensive initially but can save some headaches later about "whose job it is," since you don't have to empty it so often and there isn't much odor.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3261+1926+18190&pcatid=18190Finding "cat furniture" that has as small a footprint as possible can be an issue. It's also important to avoid objects that could fall over or be tripped over. That's why I like the idea of a cat tree that is firmly secured both to the floor and the ceiling. This will give the cats their "own space." If the cats do spend significant time there, this will also cut down on cat hair on "people furniture."
http://www.drsfostersmith.com/product/prod_display.cfm?c=3261+10345+2889&pcatid=2889There are benches designed to fit over litter boxes, hiding them entirely. This is esthetically better as well as a good safety precaution for confused residents.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3261+1926+14885&pcatid=14885There are always one or two people who just don't like cats. Supplying them each with a small squirt bottle of water (can hang on a wheelchair or walker) will empower them to "protect" themselves if the cat gets too friendly. This is a common and non-harmful training method for cats. Of course this will only work if the folks aren't inclined to take pot-shots at the cat for no reason...
I'm always interested in anyone else's ideas for keeping pets in elder homes.
Good luck!
~ Linda Galvao