I just came across a product called the Global Village Shelter. These are not high-design, multi-thousand dollar homes; they are prefab disaster relief housing. I thought the product was impressive, especially how easily they come together (stills plus 10-min video). The company explains:

"The Global Village Shelter (herein 'GVS') is an alternative to current solutions for disaster relief housing. The present disaster relief field relies heavily on tent and tarp structures; these structures offer little protection from outdoor elements and no sense of personal space. The GVS is a rigid structure that can be assembled in the field by two people in approximately15 to 20 minutes. The instructions are simple graphics with limited text. The user simply unpacks the base and the roof modules and assembles the GVS on site."

The shelter comes in 67 sf and 225 sf versions. Features worth noting (for the 67sf version):
• the weight of the entire package is 170 lbs.
• cost just $550
• have withstood winds up to 80 mph
• last 18 months or longer