I don't think it's money that's stopping him from going to a gym.  His legs are terribly messed up; he can barely go anywhere at all. I really don't understand, though, why a person like this wouldn't consider just throwing money at the problem of eating less.  It seems like something even an out-of-control food addict could manage, given some reasonable moments here and there (and Boogie is certainly capable of being reasonable at least some of the time).  Like, at the worst, you could rig up something involving door locks and some kind of hired prison warden to keep you from eating more than you wanted...  it really doesn't seem that hard, even for the most mentally ill person.  I have to suppose that he just doesn't want it that much, though he pretends to be deeply interested in losing weight.