Bama, you sound a lot like my daughter. Any time other people make a suggestion that would help with some of her problems, she starts in with excuses why it won't work, often before the whole sentence is finished by the other person.
There
has to be a way to get you in to rehab that won't tax your parents financially. You have to get out of that living situation if you're ever going to get better. Honestly, rehab will be a lot less expensive in the long run than another funeral and the pain your mother will have to go through from losing all of her kids.
You know I'm not saying any of this to hurt you. I know deep down you're a great girl who deserves a clean, healthy life. You can break this cycle. It's going to be hard, anything worth doing is, but you don't have to keep living this way.
There's got to be a way around the system. If people can be forced into rehab against their will, why can't people who are begging for it get in?