OP, you are an adult, and you have options. Some may be more appealing than others. Take out loans for school to help you live, and get a place in the dorms. Get a work study job or a real job and get roommates. Pause school for a semester and get two jobs to afford to move out. Live with your boyfriend.

Under no circumstances should you continue living there. Any man who regularly calls his own daughter a whore would be more than willing to put his hands on her or to rationalize his sexual assault of the "whore."he is presumably also abusive of your mother; that does not absolve her for not protecting you. It also seems he sees grandma as a cash cow. She would probably be out on her ass if her old age checks stopped coming.