That depends entirely on what you want to build. The less cramped and shitty you want your container home to feel, the more it will cost relative to traditional construction.
$3000 to plop a container on her property, paint it, and redo the floors. It's not a livable space. No windows, no insulation, no plumbing, no electricity, no heating or cooling. She calls it a "glorified tent".
But yes, if that's what you want and you can get a good price on the raw shipping container and don't mind doing all the labor yourself, the final price isn't too bad.
Edit: Actually, they have a lamp, so they must have some sort of electricity supply.
