I just don't know.
While it may seem like a bargain at first, you also have to consider the insulation. We are talking a steel box with no wiring, no insulation value. Unless you get the old refrigerated ones. They are more expensive than the regular cargo containers.
Besides these containers are only 8 feet across - I live in a trailer 10 feet across it ain't no pick nick

If you are interested in cheap alternatives to conventional brick or stick frame you might want to think of Straw bale construction where straw bale becomes the wall (with an R value of around 45) covered in wire mesh and stucco. Post supported roof is common enough, some areas have code allowing bale supported roof.
The upside is that you are using a renewable and cheap material (bales of straw) that is easy to stack and pin together with rebar - it forms both structure and insulation at around half the cost of conventional stick frame, insulation, wrap and then exterior/interior finishing.
There are many sites on the subject:
http://www.ask.com/web?qsrc=17...0bale%20constructionCalifornia Building code in most areas allows straw bale construction. Single story 8 bale high roof supporting walls (think 18 high by 24 wide by 3 feet long) or 12' high. If you use beam or post supported roof with lumber or steel members it can be a 2 story house.
Bales are flexible enough to sustain earthquake rocking without collapse, further they are well insulated - you wouldn't need much more than the regular appliances and a small furnace for heating in most areas in California, and cooling costs would be nearly half if your structure is built with solar gain in mind due to the thickness of the wall.
http://en.wikipedia.org/wiki/Straw-bale_construction has pictures.
California Straw Building Association may be a good place to start.
http://www.strawbuilding.org/pages/main.php?pageid=1