Homer,
Old Radios has most of the good idea, but go the whole way. Use Strips and Treats or Street Alas to plan the whole excursion and ask it for your fuel cost. Look up the campgrounds you expect to use and get the rates. Roll that all into a spreadsheet and you will find that RV travel compares favorably in every category except time.
I had planned a comfortable retirement, but (the following is not political, it is fact) about 25 years of savings carefully invested were "redistributed" (specifications on request). We sat down and did spreadsheets just like I described and found that we could still travel about 12000 miles a year as long as we do nothing when we are at home. So, we travel. We eat in the coach and see what we can see that is free or low cost. We frequently overnight in places that are free. When at home, we don't go out for meals or movies. But, we still travel. The new motorhome will just have to wait about twenty years.
Matt