Help!!!!

My "father" is abusive, constantly. It'll be going good for a few weeks or even a few months and he does something he shouldn't or he and my mom argue, I stand up for her, that pisses him off because she won't and honestly can't after nearly 30 years of this bullshit, we argue, my mom begs me to stop, then we all hardly say one word to each other for a few days. He was AWFUL to her twice already this year and I stood up both times. I've lived in domestic violence probably since I was born (I'm 25) because of him. I can't afford to live on my own and there's no chance of finding a roommate. I've been in 3 relationships and all 3 were toxic and 2 were with possibly narcissistic men. My "father" got SO pissed about how they treated me yet he's done the same to my mom all these years. She wouldn't dream of leaving him, there's absolutely no chance of that ever happening, no matter how bad he gets. He knocked over something of my grandmother's (mom's mom) 30 minutes ago and it didn't break, but it almost did. I got on to him about it, he got in my face, yelled at me to get out of his face, and pointed his finger at me. I'm currently trying to pack a couple bags when I know good and well I have nowhere to go, so there's really no point. I also can't afford to live on my own until I'm able to get a higher position at work, which will hopefully be soon. He's thrown stuff, broken stuff, slammed doors, and I'm sure there's more I don't know about. My mom constantly blames his outbursts on me. He got pissed about how my recent ex treated me and threw a huge pot that was sitting outside. She said it was my fault. I'm tired of her trying to make me responsible for his behavior when he's almost 60 and will not control his own emotions. My 17-year old brother is headed down the same path he is. He also yells at my mom, will not admit to any wrongdoing he's ever done, and if she tells him no (which is hardly ever) keep pushing her about whatever it is that he wants until she has a nervous breakdown and gives in. I'm basically living with 2 massive narcissists and their enabler at this point. I'm not sure if I'm posting this for advice, to vent, or to share with other women who may be going through what I'm going through, all I know is I'm hurt and tired. I have a massive amount of trauma because of all this. If it affects anything, I'm possibly autistic and possibly have ADHD, SPD, OCD, and God only knows what else. I know for sure I have anxiety and depression. I'm a teacher trying to heal myself all on my own so I don't project this onto my class ( yelling, not validating the kids and their emotions, not holding the kids accountable, favoritism). They (my mother and "father") are very old-fashioned and are behaviorists as a result. They don't believe in therapy/medication and don't think it would help with my issues. I have no way to access help because I have no car (again, I cannot afford this) and my mom doesn't want anyone coming to the house to pick me up unless she said it's ok, and definitely not for me to get therapy.