When I lived in South Carolina, on James Island near Charleston, they have a large county park built on salt marshes, and this park has a fabulous Christmas lights display for folks to drive through during the holiday season. There is a sizable community of retirees that live in land yachts and maintain the bulbs, frameworks, and hundreds of mile of cable for the lights. I've met other people who live in RVs and travel to different National Parks to get a hook-up in return for cleaning rest rooms and picking up trash bags. There are over 4,500 RV campgrounds in the country, so a lot of people are living in tiny houses that move around. I don't think that any of them are electric though, even though they alresdy use a bunch of batteries.