After all the stuff that we know (and all the stuff that we can only imagine), I did not get the impression that there was anything worth saving. His wife and daughters need stability and a warm home environment with less anxiety and stress. He does not seem like the type to change his behavior for their sake. He strikes me as someone who is on a long spiral downward, and it's better for his family if he does not drag them down with him.
So I think it's probably for the best if he moves far from them and goes on about his self-destructive business. Maybe he will hit rock bottom before it is too late and turn his life around. Maybe not. Better for his family to be free of him until he decides one way or the other.