This is not a new idea. After World War II, Carl Strandlund developed a mostly metal home, the Lustron House that was built on an assembly line, delivered on a truck, and promised to “defy weather, wear and time.”
The Lustron Corporation quickly ended in bankruptcy, but there are three Lustrons in South Bend. Here is a photo of one on Mishawaka Avenue.
Not the prettiest home I’ve seen. Guess that was not the thought behind his idea though.