One thing around here that makes Nursing Homes hard to book is the number of musicians that play them for free. They think they are "helping the old people", but in reality they are helping the people who own the NHs and who have plenty of budget to spend on entertainment. Most of the time they get what they pay for though!
I've had better success with nursing homes in small outlying communities. They are pretty much starved for good entertainment.
It seems all the NHs get a lot of church groups and Gospel singers, and this is good, but shouldn't have to be their only entertainment, music-wise.
As far as price goes, if you can get $100. for an hour show around here, you are way ahead of the game. I'm sure it's different in larger areas. $100. for an hour sounds o.k., but you have to really allocate 3 hours to allow for travel, setup, teardown visiting with residents, etc. Anything much less and it gets marginal really quickly.
The exceptions are for events such as annual Christmas parties or Octoberfests, etc. They are accustomed to paying a little more for these.
DonM