Endstage cirrhosis and Hep C? How much longer does he have to live? It would seem to me that that is Question No. 1. Everything else will follow from the answer. If he has less than a year to live and at this point (endstage) can do nothing to lengthen his life expectency, what's the purpose of sending him to AA?

To me the situation is similar to that of anyone with very advanced cancer, where a decision has to be made either to continue "heroic" measures in hospital or go to a hospice and get palliative care. I strongly believe that for people with very little time hospice and palliative care are the best choice.

If he's going to go relatively soon, you might well want to discuss with his doctor(s) how to best make him comfortable for the rest of his short stay. AA and other hard work projects would, under those circumstances, not seem really supportive to me. Take care!