Sorry, but the Army has both of you beaten. They've been housing people in shipping containers for a long time. Look closely again at the "walls" behind my living area
in this picture. These particular shipping containers housed some of the higher-ranking Czechoslovakian chemical recon unit that shared a warehouse with us. Yes, living space was pretty tight at Camp Doha.
Having standard-sized containers also allows them to build these huge trucks with massive arms that are just the right size to pick up one of those bad boys, swing it around like a suitcase, and then set it down.