215 sq ft 'Flat Pack' House by Tata
I somehow got subscribed to Anchor Bay Tile's newsletter and they had this article about a house that Tata (a manufacturer in India that I know of by their cars) is selling for about US$700.
They include a floor plan in the article.
If you are not familiar with the term, "flat pack" describes how all of those build-it-yourself furniture pieces are made, to fit into a flattened cardboard box for shipping. RTA kitchen cupboards and Ikea furniture are "flat pack".
Here is a link that might be useful: Tata's Flat Pack House