So it's basically mobile home/office/RV, but on a van chassy, like the Promaster, Sprinter or Transit. Lots of them have showers, lots are built by the owner, the vast majority have lithium batteries with solar, and they all carry gallons of fresh water. Small fridge, small galley, some are AWD/4WD. Some are diesel, some are gas, some have propane for heating and cooking.
They seem like a really good choice to live a more nomadic and very stripped-down lifestyle if you don't need "stuff." Whoever was the first to come up with it being a mobile studio apartment is a genius.
Yeah, the wife and I RV'ed for about 3 years and found out that it places physical demands on you no matter how fancy your rig is. Just long-distance driving alone can wear you out. Living in cramped quarters is another stressor, and with dry camping (no utilities, water, electricity but what you carry with you) depletes your water and battery life quicker than you'd think. Basically what we found was that there is a certain sub-culture of people who live the nomadic life and can take the privations of it all, and we weren't made for that. But I got it out of my system, saw some great places in the country, including Monument Valley, Zion National Park, and much of the west.