My husband needs back surgery but can't get it done because of his weight. is there a way around the requirements to have to be in a group for months?

Talk to the surgeon: Weight (both overweight and underweight) can be a risk factor for complications of surgery - particularly a major surgery. Discussing the reasoning behind delaying surgery with the surgeon who may perform the surgery can give a better understanding of the reason behind the delay and the importance of addressing weight or other issues before surgery.