I haven't see or spoken to him in 20 years or so, but I'm friends on FB with one of my first employers. He's a big-time minimalist. He and his wife are fairly wealthy and live in a 340 square foot home on a river in the northwest. This is his one and only home, not a vacation place. From his posts, he built it himself for about $15,000 and I gather it's something like this:
Probably bigger than that, but it has three rooms, not including the bathroom, which he says is has a toilet, sink and 3x3 foot shower. He says you can sit on the toilet and turn on the shower or sink.
Here's one of the many micro-home websites he posts about on his FB page:
http://tinyhousefor.us/
He's stated that he has three pairs of pants/shorts, four shirts and three pairs of underwear. He has one suit just in case he has to go to a funeral or something. Uses the same bar of home-made soap to bathe, wash his hair and shave. They have no TV or cell phone, but do have a landline, internet access and one laptop.
He's an interesting guy. A libertarian who believes that the federal government's only (and, I do mean ONLY) role should be national defense. He's pro gay marriage, but is generally not a fan (to put it mildly) of any shade of brown people. He's a big fan of the military and regularly posts info about soldiers, sailors and airmen who have lost their lives in the line of duty. But, only if they're white. I've seen two or three people post links on his page about the deaths of non-white servicemen and women. Those have always been deleted quickly without comment.
He's also a huge proponent of organic, non-GMO food and believes that anybody who wastes time and space growing a lawn instead of using the space as a vegetable garden is certifiably insane. He's pro-hemp, wants to do away with criminalization of all drugs, anti-religion, pro-gun and pro-choice (none of the government's business). He also loves him some very high-dollar scotch. I'm talking thousands of dollars per bottle.