Move somewhere where you can afford to live in a real apartment or a commercial campground that accepts people living there full time in real RVs. It would be much safer for you and your belongings in another, cheaper state that way. Living in any kind of "stealth" camper would mean you would get your tires, wheels, and anything else removable stolen from you.
You would also be able to have a flush toilet, be able to take a shower, and enjoy the convenience of a refrigerator and kitchen, plus you would not get arrested for illegally camping.