Boy do I relate, TryingToLearn. I actually titled a recent post of mine ' The Long Road, because as you say, sometimes it takes much longer than you want it to, to get where you need to be. I am my worst enemy too.
When you think about it, you taking care of his financial mess is like bailing out a boat with a hole- it's gonna keep filling up again.
He may not be very nice about you parting ways, as you are making life (as he lives it) easier for him. Please be safe and have a plan in case he gets nasty. I know about the not talking stuff... the manipulating anger and silence.
Its not your fault that he's in this mess, or that he makes the bad choices he does.
I am sorry you are struggling. It sounds like you work hard, and someday, your hard work could make your life secure and peaceful, on your own.
You have the right to be as happy as you can possibly be. You wish for better things. don't let someone who wont get in the life raft take you down with the ship.