This is one of the reasons the tinyhouse movement has become so popular. In Texas (and many other states), you can build your own house on a trailer and registe

This is one of the reasons the tinyhouse movement has become so popular. In Texas (and many other states), you can build your own house on a trailer and register it as a homemade travel trailer. RVs, being vehicles, are usually exempt from building codes. The main hurdle becomes finding a municipality that allows fulltime RV living which, depending on where you live, may be easier than jumping through regulation hoops building on a foundation.