I don't have any resources for yo as far as the medical field...but i know it's a great career. Is that what you went to school for? Maybe you could go back to school and get your degree. Federal financial aid is easy to get.
I'm so sorry you are having to deal with his family, they sound like awful people.
Have they ever read about addiction? What in the world makes them think you can 'fix' him? I guess I don't have much info for you, I just want to give a hug.