Shysher
Now I am really worrying about your son living in a B Van or any van unless he has a legal, realiable and viable parking location, especially, one with the necessary hydro. He also needs black/grey tank dumping facilities, noting that B vans dont have large capacity storage for waste. Security is also a consideration. If he has a known friend or family member with a safe location, then it might work. Then again, he needs to find a well -maintained RV or he might have costs which are prohibitive.
My very best wishes for this young person.
AL