I need to leave but just can't afford it right now

I am beginning to hate living in my home with these evil self-righteous people. Everything I say and do is seen as an insult or attack against one of them. Funny these "saints" did not have a problem like this with me when I was able to financially support all of them. No matter what I say or explain to my dearly beloved sister, I am still in the wrong. Until, of course, her dearly beloved daughter turns on her. It has happened and it will again. Anyone who picks up a weapon and threatens to kill me, is capable of killing me and anyone else she sees as her enemy. And at times she sees her own mother as her enemy. But I have to remember too, that my sister is on very strong prescription drugs that must be effecting her thinking. Morphine and other pain killers must effect your thinking in some ways. The one person she believes to be at the center of all the family problems now is me. I am hurt and disappointed in her and in her thinking. Her daughter has a young man living here as her "hubby" in front of her 5 year old daughter, in a minister's house. Before him, there were at least five other men in her life. She says she has to have a man in her life. All of her daughter's behaviors are fine with my sister as long as her granddaughter stays here. At what point does having your daughter live like a whore in front of your granddaughter seem like that is the wrong thing to do. I am told that it is not my business. I am told to pray and get over it. I am told that I take out my frustrations on everybody in the house. All this "profound insight" comes from my sister who takes pain killers everyday. I know it is pointless to talk to her about anything anymore. So I have to leave here before these "good and righteous" people kill me with a heart attack or stroke. My sister says she does not understand what I get so upset about. But she is the one with the college degree in counseling psychology.
It's funny how she is quick to tell me something is wrong with me and say I need help. I really do need help! To get the hell away from all of these "saints"!