Tesla and SpaceX CEO Elon Musk, one of the world's richest multi-billionaires, is now living in a USD 50,000, 37-square-meter prefab guest house in Boca Chica, Texas, where his SpaceX headquarters are located.

Musk could afford to live anywhere, in any sort of lavish abode he desires. But he seems to have delivered on a vow to exit California and "sell almost all physical possessions" -- including six Californian mansions -- in the pursuit of "freedom," according to website i.stuff.co.nz.