Hmm.... take this for what it is lol. If I were in your position, knowing that I was going to be living out of my car, and that there was very little hope of friends or family being able or willing to help improve my position. I would accept it. It is what it is.
Now, You happen to live in America, so:
We have food stamps - get them.
We have welfare - Use it.
There are food banks - find them.
There are campgrounds, parks, or other locations that you can cook food at. Some supermarkets have microwaves available.
There are inexpensive cooler/refrigerator units that are built for cars.
Get a Gym membership for like $20-$30 a month, possibly less, and use their showers.
Wal-Marts generally allow overnight parking. Its well lit, patrolled and videotaped.
Go where you want. Work odd jobs, move on. See the country.
Or go somewhere you want to be, sign up for all the benefits you can, food stamps to buy food, welfare to pay bills, buy gas and clothes. Sign up for Section 8 housing. The line is long, but it doesn't hurt to get in it. If you don't end up needing it, all the better. Apply for jobs, sign up at temp agencies. If you need an address, get one at a mailbox store. Some give physical addresses.
Move to where you can breath. Start fresh. Start working, keep your head up, and change your world! But never stop looking forward! The past is dead, the present is dying, the future is alive.
Shrug. Its going to be different. Its going to be difficult. Its probably going to be scary at times. But I think you will be just fine.
<3
Shaftiel
Edit: Found this http://carliving.info/101.htm
Its a good read I think. He doesn't like the idea of Gym membership, but hes talking about it costing $55 a week. That's insane lol. Mine is $29.99 a month. shrug, take it for what its worth