My oldest stepson has a lot of issues including mental illness he does not feel he needs to address, PTSD from a stint in the military. Alcoholism which he has beat, is an avid smoker of weed but the most debilitating is a Heroin addiction that he repeatedly beats and succumbs to.
He has, in the past, lived in a tent at a state park while using a bicycle for transportation. He's moved up in the world because he now lives in a POS van that he cannot lawfully drive (but does drive) because he has no drivers license, no insurance and who the license plates on the van belong to is something I don't really care to know. He works odd jobs for cash to support his drug and cigarette habits and gets picked up by the cops on a semi-regular basis because he's on the hook for over $50K in past due child support for his son that is now 23 years old. He recently got out of jail when the county determined that even though he owes all that child support they can't get blood out of a turnip. They charge inmates for their stays so he owes the county money for that now too as well as all his other times in jail.
He's got problems and you've got problems.
As you say now and as you've said before in your many threads, you're in a mess. The first step towards turning things around for you will be when you come to the realization that the help you need will not be gotten here. It doesn't matter how many different scenarios you try to come up with, how many roadblocks you envision and how much guidance or help you ask for here because the help you need is to correct what's going on between your ears.
You're not going to get that here. In the meantime, maybe you should start looking into tents.