That is a tough one, he has to really want it. No one can make him get sober. I had a drinking problem and a bad one when I was younger and it took me hitting rock bottom and hurting someone I cared about pretty badly in a black out state. Some never wake up. I wish I had some better words of advice for you but I don't. All the enablers need to go away and helping him out of trouble doesn't really help him with his problem.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!