An ADU in Austin

Austin dwellers Michael and his girlfriend Beth are modern American nomads. They want to keep their financial commitments low, and their flexibility high so they can wander the world as they please. Michael's normal-sized home of ten years seemed like an impediment to this lifestyle, until he got a brainstorm. Suppose he rents out his current home to help pay for their travels, and puts a tiny, manufactured  ADU (Accessory Dwelling Unit) in the backyard to use as a home base between trips? The search is on!