If you're not familiar with it, Airbnb is a peer-to-peer lodging service that lets people rent their homes to visitors for short stays. Steve isn't offering his house, at least not all of it, just the Tesla Model S to sleep in. Although, folks are also able to use the kitchen, living room, TV and bathroom in his condo.
It's actually hard to tell if this guy is joking or not during some portions of his ad. For example, you shouldn't worry about comfort because photos show an airbed able to sleep two people in the back of the Model S. Also, security shouldn't be a concern because renters are "locked securely in my attached garage" at night. Don't you feel safer already? Light shouldn't be a problem either because the vehicle is equipped with two remote-controlled candles.
This might not be the most relaxing vacation to Phoenix, though. The host admits that the Tesla is his personal car, and that means renters need to be up by 8:00 AM for him to go to work. Since Steve's also a licensed limo driver, you can hire him to drive you around, even on guided tours.