Free Gym
Check with your local Y. They usually have scholarship programs. How it works varies a bit from location to location. My sister gets a FREE membership for her whole family but she has to volunteer at the Y for something like 12 hours a month. I had a membership at my Y for myself and my nephew when he lived with me for about $20 a month.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.