Martin Q. Blank said:
There's one at 204 Cordell. Featured in some magazine years ago. I don't think it's necessarily low cost.
The interior on a standard container is only 7'-9"ish high. You can get a "high cube" container that is a foot taller. Some kind of finish on the ceiling is going to cut that down.
All the exterior walls are load bearing so if you cut a hole in them (for a door or window not on the ends), you have to go back and reinforce it, especially if you're going to stack them. If you want to stack them in any way except the standard configuration with 4 corners locked together, you're going to have to reinforce it.
Unless you want the interior to resemble a shipping container shaped oven, you're going to end up furring the walls with wood and adding insulation which will cut down on the total interior volume.
I don't think they end up being that affordable, and the restrictions that they create don't seem fun for me to deal with.