There is no way that this is a realistic cost. If someone quoted you $200,000/person for building a 1 million person city from scratch in the middle of the des

There is no way that this is a realistic cost. If someone quoted you $200,000/person for building a 1 million person city from scratch in the middle of the desert, it would be a lowball figure. The Masdar city in Abu Dhabi was planned to cost $20 billion and house 40k people. That's $500,000/person, right here on Earth where breathable air and protection from cosmic radiation is completely free of charge, and you don't need to launch anything out of Earth's gravity well. So if Musk had a realistic way of reaching $200,000/person, he could start doing it on Earth and completely fund his Mars project purely from the profits of selling the Earthside city to someone else here on Earth.