"A world where most housing becomes disposable (i.e. it is not directly tied to the land it sits on) would be very different from the one we currently live in."
Didn't we have an article on HN talking about Home Depot and how Japan's houses are basically disposable? Still tied to the land, but torn down and new build instead of home improvement.
One variation is the campground model. I have a camper parked at a fairly decent campground, costs are about 2.5K a year (plus electricity and waste disposal). But where I live the camping season is about 5 months. However, it doesn't have the feel of a trailer park -- instead if feels like a resort area.
[edit:] yep, https://news.ycombinator.com/item?id=10303455