It's not every day the world's richest man trades a mansion for a metal box. Yet Elon Musk-worth hundreds of billions and famous for reshaping industries-now calls a 375-square-foot prefab house home.

Elon Musk is the richest man alive, with a net worth that ended 2025 at around $726 billion. But when his mother comes to visit, there's no guest house. No luxury suite. Not even a proper bed. She ...