I would make it a priority to get away ASAP even if you have to get a roommate or something to downsize living costs.

I can tell you from experience that living with your childhood abuser is unwise. I lived with my mother who was an abusing control freak well into my adult hood before she passed away about 4 years ago and I didn't stem out to be on my own until 8 months ago.

Living alone has it's challenges but I'm significantly healthier now compared to what I was 4 years ago. In fact, if anybody that knew me back then saw me now they would think I'm a different person.

So leave any way you can. You will be a completely different person.