This is how the Japanese homeless roll.
In 2000, architect Kyohei Sakaguchi ran across this homeless camp along a riverside in Tokyo. The homeless man who was living in it worked for a camera company and knew his electronics - so he outfitted his "Zero Yen House" with a solar panel that let him watch TV and listen to the radio. Swing over to Neatorama to see a diagram of the interior.
His shelter may be small, but doesn't living in something as well built as this lift him out of the category of being "homeless"? What's the functional difference between his home and Jay Shafer's Tumbleweed Tiny House?