(Image credit: Apartment Therapy )

Little House on the Trailer owner/designer Stephen Marshall designs and builds tiny 120-400 square feet homes. He build them on top of a flatbed trailer, and then rolls them out to his client's site. The photo above is his "Room of Your Own" model, which has a footprint of 120 square feet. Prices for all the mini homes range from $45,000 to $65,000.