Homelessness, extreme weather, civil unrest — the 21st century is going to give us a lot of reasons to house people as cheaply as possible. So hobbyist Malcom White came up with a way to create a 118-square-foot "yurt" that can be prefabricated and then transported via flatbed truck to wherever it's needed. Total cost? $300 to $400, or one quarter-ounce gold dubloon once the United States of America has atomized into regional duchies all paying tribute to whichever Paul is president/king in 2018.

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