Obesity is Killing me, I really need help?

I am 63 yrs old and weight 350 lbs. I have diabetes, high blood pressure. No cartilage in knees and sciatica. My insurance will not pay for for a gastric byp, no a lap band. Doctors tell me to get out and walk, but I cant with my knees the way they are and besides my feet are so numb from the diabetes, I don't always feel what is under them. I am on antidepressants. People tell me to go to Jenny Craig, or one of those place but I cant afford that. I have tried weight watcher, but I do not seem to be able to accomplish anything on my own. I truly need help. I am so happy that my daughter was able to have the byp so that she will not have to suffer like this her whole life. I would give anything to loose 100 lbs before I turn 70. There are so many people out there that make money off of peoples short coming, like having not will power. There has to be somewhere I can go to get mental support and maybe even make some friends in the process. Arizona Desertrat.