I need help escaping an abusive environment

I've been planning to move to WA for school for months now. I have a school bill that would cover rent. My dad agreed to cosign a lease for me and give me "my" car that is in his name to leave in. Today he told that after much consideration, because he thinks I'm mentally ill (because I'm trans) that he is no longer willing to do those things until I'm "better" (not trans) He also said he believes I need to be put in some sort of in-patient mental health facility. (not that he could do that) but I see a therapist regularly who thinks I'm fine and have no history of diagnosed mental illness. Again, he only thinks this because I'm trans.
I have classes scheduled at a college in Spokane that start in September. I was approved for my benefits and have a pending apartment application. I've been desperate to finally get away from my abusive 60 year old trump supporter evangelical parents and get into a situation where I'm free to be myself and just doing to best to cope in the mean time. The thought of being trapped in such an awful environment that I was so close to escaping has me shaking.
I have $1,500 saved up for the move. but no car, unless he decides to give me mine. no income aside from the months I'm attending school. and no way to sign a lease on my own.
I feel like my world is crashing down all around me and I just no idea what to do.