Where are you located? Are you someplace where it freezes in the winter? Do you have a way to get power (30 or 50 AMPS) to the location where it will be parked? How about water? You will also need to drain the waste. If the home has a septic system, you could likely drain into that, as long as it is level or down hill. Draining uphill doesn't work so well.
Will you have a reasonably level place to park it?
Just want to make sure you are thinking this through, so you don't get in over your head.