C.B.
I am so very sorry you and your son are going through this. Once again, let's thank Ronald Regan for closing all of our mental health hospitals!
Unless you have money or insurance, there really isn't much anyone can/will do to help you until your son commits a crime and then everyone will be looking to lock him up and they will all be saying "where were his parents." Just like people on this site said when that poor guy killed all those innocent school children.
People just don't understand that unless you are independtly wealthy, you are not getting mental health treatment. Period.
At the very least, please apply for social security and Medicaid for him. At least that way he can hopefully have some out-patient treatment and medication. Of course, the application and approval process will probably take 6 months. In the meantime, call your local county hospital and see if you can get him committed for a 3 day observation period. That would at least get him some temporary, immediate assistance.
Again, so very sorry you are going through this. I know it's truly heartbreaking!