They built a house in Austin for $10K. This house took only 24 hours to complete from start to finish. It was about 650 square feet meaning that it is about the size of a one bedroom apartment.
I could see these becoming popular in some cases even in the USA. After a major natural disaster they could quickly be constructed. Probably better than current FEMA housing options. Empty nester housing where a couple might live six months out of the year. Starter homes for people in their twenties who couldn’t come close to affording a house a today’s prices. Vacation “cabin” that’s only visited a few times a year?