We live in a senior apartment complex. My wife needs physical therapy to assist her with pain control. The more she stays immobile the worse she gets with pain moving from joint to joint. It is very difficult to get her up and to her chair and to take her anywhere. If we could get help here in the facility it would be at least a step in the right direction.
If that does not work, you can buy resistance bands online and those small exercises help a lot. Buying weights or balls also help. When my grandpa was in a rehab facility, one of the group exercises was to throw a bouncy ball to others in a circle. You could do that with her. Or, you could hire a caregiver for a bit as a lot of them are trained in light PT and learn from them. There are many handouts online on simple PT exercises that one can do in bed or in a chair.
As for finding a physical therapy group that will come to the house, you would need to call around. First try your local County/City council on aging to see what recommendations they can make.
At home therapy verses outside office therapy. My Dad had both. The at home it was limited what items the therapist could bring with him/her. At the office therapy, it was more like a small gym with machines to help with the exercises. Dad did much better going to the office for therapy. But that meant gather him up with his walker and driving there 3 times a week. Dad also had home therapy but that process was slow in his case.
If your wife has mainly male doctors, then see if she can get a male therapist. If mainly female doctors, then a female therapist. It's a comfort level.