All I have for you is go to www.nami.org. They list mental health facilities by state. Get on the phone and start calling. Start with a hospital with a psychiatric unit. Call and ask for the nurses's station. Explain briefly what you need. Ask if they know of any free clinics or facilities around. Call the county. They may be able to give you some leads. Who diagnosed him? Tell them you can not afford treatment; can they give you a bunch of samples of the medication prescribed? Then call the drug company and tell them your story. Frequently they will give the meds to those in real need. He should qualify for disability and a medical card through medicaid. Those avenues may take time so start now. The doctor should be able to sign the proper paper work to have disability started.

I hope one of the above help. Sorry I don't have more. Wait - yes I do. If you are in danger, have a plan and a place to go and do it if things escalate. You are no good to him or yourself if he hurts you. Take care of you first.
All the best.