You may want to look at some floor plans, a typical RV has only 300 or so sq ft living space. A park model maybe 600. A single wide manufactured home 1,000 square feet. You need to check first with your local zoning board, see what is allowed to be placed on your land. Even if no zoning, you still may have trouble with sanitary codes, there should be some sort of county or regional environmental engineer who can help you. As for power, bringing power to your land can be expensive, depends how far away from the road you are.
As NCWriter said, sounds like you are planning to live in one area, an RV may not be your best option. Welcome to the forum, lots of great folks here.
