If you are looking for that house for under $20k, look no further than Global Portable Buildings, Inc. of Santa Rosa, California. They make a standard storage container into a very livable structure, which is also very affordable.
Global Portable Buildings, Inc. build the “Ultimate” with its modern finished kitchen, bathroom and extra room (8′ x 40′ model).
Their most complete portable building. Standard features include kitchen, bathroom (with shower, toilet, sink), AC electrical system, telephone/internet connection, 2″ rigid insulated finished walls and ceiling, windows, entrance door, finished linoleum/vinyl floor and utility room.
Unlike most of their competition, these are available now and all you need to do is place an order. They can be shipped anywhere around the world. These are not just fancy drawings and renditions of ideas.
According to Sean Taylor Vice President of Sales & Marketing. These can not officially be called homes, but what people do with them is their business. Although aimed at the construction industry, you the buyer will need to verify with your area what permits etc. are required.
Some suggested uses are: hunting cabin, guest cabins, mother-in-law cottages, retreats. These are very affordable with the 8 x 20 starting at $16,500 and the 8 x 40 starting at $23,500. Plus shipping to your destination.
Additional options such as solar are available.
Visit their site for a virtual tour and a movie by CBS news