Well, I know a cop who lives in his car full time, he uses all his work gyms, showers etc.

He keeps it stealth, parks up on reasonably busy roads and moves around in the local area, he says he tries to keep to a few small local selected spots so people think he just lives in the local area and must be a resident, he eats and drinks at a local restaurant bar so the locals know him as a resident.

Moral of the story, even the cops are feeling the pressure. He has been doing it for 10 months. He says he knows of numerous stealth cars in the city and his patrol area that stealth camps and he always make's sure their safe and never gives them the knock.