Good luck to him. I'm sure there's a lot to be said about not letting yourself get into this situation in the first place, but I hope the story has a happy ending.
I think someone who is this obese has some physiological problem, that his "wiring" is off and he never feels sated. I think he should get the gastric bypass procedure as soon as his weight is low enough for him not to be killed by the anesthesia.
"But when you're an overweight child in a society that demands perfection, your sense of right and wrong will always be terribla' skewed! I eat because I'm unhappah...I'm unhappah because I eat..."
I sure pray he makes this goal. Being morbidly obese has to be a living hell. I know many people do it to themselves, but it's still awful. Godspeed to him for trying to come back to a liveable life.