You can buy 2 40ft containers for about 240K..
A house like the one above would cost around 750K to complete IMO..
Dont forget..No foundations or concrete posts or beams..Just a Concrete base about 4" thick.
The only problems are transportation and getting the things in position.
The change I would make to the picture above would be to extend the roof another 14 ft to produce shade and a car port.