Do not put any of your assets or credit at risk. This is his problem and while you can help him with a strategy that should be it. Your brother owes a lot of money to a lot of people but there is information missing here that might help us understand the situation better. For example, what is his income, does he rent or own, what state does he live in, what amounts owed are secured loans, what bankruptcy chapter are the lawyers recommending? Can he get a roommate to reduce housing costs? What else in his "basic expenses" can be cut out or reduced? Some people would think they have to keep cable and their high priced cell phone plan while it might be better in the long run to pay the early termination fee and eliminate the monthly cost. Does he have health insurance that will pay for his surgery and PT and are his deductibles paid for this year? If so, he should have the surgery this year rather than waiting and having to pay another deductible for the new year. Can he save costs on any of his insurance? For health insurance, the window to change is coming up and he might look to see if there is a lower cost plan that he qualifies for. If his problem is that he has been spending too much and has enough income, getting him on a plan to pay things down might be the discipline he needs but he has to be willing to change. Spending money because you don't feel good has to stop. Trying to snowball will be a waste of money if he ends up in bankruptcy after all. The lawyers probably see that since they should have a more detailed picture. Probably the most important question is will your brother go back to his old ways if bankruptcy clears all his debt for him?
He absolutely understands the connections and knows that he has to change, but there is a lot of hopelessness going on also. The vast majority of it is medical debt, so he wouldn't be in much better shape even if he hadn't over spent at charity events and the clothing thing. He does live pretty bare-bones, no cable or anything, only his work phone, etc, and he hasn't been going to PT for awhile, but he makes stupid mistakes like giving into a couple of threatening creditors, sending money to them, and then getting into a vicious over-draft cycle that he didn't know how to stop. (He eventually went to the bank and had them freeze his account and he's ok on that now, but that cost him a ton for a couple of months.) Understanding the connection and changing the behaviors is two different things, though, and of course there's no guarantees he won't be back in this situation again in the future.
DH and I have never had any personal consumer debt, not even vehicles, and we paid our 30 year mortgage off in less than 10. I Can definitely help him in planning all of this, looking at where else he may be able to save, etc. I posted the original question just to make sure there wasn't some factor I was missing, because if I'm off by just a couple of hundred a month, then this won't work, it is just cutting it too close. And I don't know anything about how things work with bankruptcy consolidation, collections, etc. I agree, I don't want him to snowball any of it if bankruptcy is inevitable, I'd rather him take the cash he's going to get from these things he's selling and put it in the savings (wonder if that would have to go in someone else's name?) so he can have something for a new-used vehicle when his finally dies.
Anyway, thanks for the additional points to consider, we will work on finalizing the plans this weekend I guess!