There’s no real easy way to find an RV park to live in. It takes leg work and making phone calls. You’re going to need to search for RV parks using Campendium.com and CampgroundReviews.com. Then you need to check that each is open year round if you’re planning on being there all year. And then you need to call them to make sure they do monthly/seasonal/yearly rentals and if they have availability for a spot or not.
Other than that, you may try checking HipCamp.com or even AirBNB to find alternative non-RV parks to stay at. Even throwing a wanted add on FB Marketplace may help.