Are you going to keep it for RVing later or just for the home build?
The idea is to keep it for a while. I've owned my current 1990 F150 for 13 years, and only put 12k miles on it. I don't drive trucks much, so this probably would stay for a while. Once out on land I'd probably use it more, I'll have a tractor and other stuff to drag around; but it still wouldn't be a daily driver.