The world's richest man says he's living in a "palace" in Memphis. It's an Airstream trailer parked next to one of the biggest AI data centers on the planet. Elon Musk joined the All-In Summit remotely in mid-September 2026 and opened with a joke: "I am coming to you today from the palace that I live in in Memphis, which is an Airstream trailer." SpaceX President and COO Gwynne Shotwell, who joined him for the conversation, backed him up: "This is Elon, by the way, doing what people don't believe he does. He sleeps on the factory floor. He's in Memphis helping build buildings." Musk is in Memphis overseeing the buildout of Colossus, the AI supercomputer campus that trains Grok. SpaceX acquired xAI in February 2026, so the Memphis data centers now sit inside SpaceX, which has traded publicly on the Nasdaq since its June 12, 2026 IPO. The original Colossus was reportedly built in 122 days inside a former Electrolux plant, a second facility is up and running, and a third is in the works, ...