I myself have been thinking about the same thing as you. I set down and made up a spreadsheet using the excel program. Listed all the categories type expenses. My spreadsheet calls for me to stay in one place for a month or so. The cost is still way more then my S.S. income. But the cost is still going to be less then me staying in my house all alone. When everyone is saying the the cost of full-timng is all over the place, their not kidding. It's all up to you on what your type of living will be. Traveling all the time is really going add up fast. i just got back from a 2600 mile round trip to Pahrump, NV and back here to my home in Abilene,TX. Gas alone was over $1200.00, not figuring in all the other expenses. So if your planning on driving all over this country you better have some really deep pockets.
I have read everything on the subject and there's on clear answer.