If you plan to park it for a long time, you'll atleast want to drive it at least once every couple of weeks to keep bad stuff from happening to the motor, tires, etc. Try to find some ethanol free gas if your going to let it sit. This E10 garbage they sell now has a very short life, before the ethanol starts to separate out, absorb moisture, and cause corrosion issues. If you can't find ethanol free, be sure to get the proper amount of the ethanol version of sta-bil. And pour some in at the proper intervals. I'd really recommend either a 5th wheel, or travel trailer though. MH'S don't like to sit for long periods of time.
