Asking how much it costs to live in an RV is like asking how much does it cost to live in a rented apartment or how much does it cost to live in a house.
The answers vary GREATLY depending upon which style you pick, how big it is and where it is located.
If you track your expenses now in the apartment, try to isolate how much you spend on items that will not change such as food, medical, etc. Then look at what categories might go down such as heating/cooling costs if you follow the good weather. Then look at what categories will go up such as fuel and of course campground fees.
