http://www.egetgoing.com/drug_addict...g_behavior.asp How to change enabling behavior.
If what you have been doing was working, you wouldn't be feeling and reeling from the continue misbehavior of your children. I have found that for the most part, people have money for what they want to spend it on. (At least when they have money that's what they do.)
You need to take care of you, first. It appears obvious that no one else is going to do that for you, and maybe you won't even get the support you need IRL, except from a T.
You need to take care of yourself,first. You're worth it.