HCG Diet/Morbid obesity

I am 58 year old with many health problems but doctors are advising gastric bypass but I am looking for alternative. I am 150 lbs overweight and have a 30 yr.old daughter also 140 lbs. overweight and a 14 year old who is 25 over. Have tried many but can't seem to be successful and gain more than lost! I am not able to exercise because of pain the weight is causing but need to walk to lose weight so there is no answer???? I need help please!???? I so stretching and what I can but not good enough for weight loss. I spend day laying down or sitting doing hobbies. I am disabled with COPD, diabetes, kidney failure (no dialysis yet), fibramyalga etc. I am a mess but need help before I give up on me. I need to help my girls but can't help myself.