RV rentals are expensive!
I checked Cruise America and you have to be 21 years of age to rent with them. You will also need to rent a pretty large motorhome to accomodate 6 or 7.
http://www.cruiseamerica.com/rv_rentals/available/large.asp
Figure on only getting about 10 MPG and gas cost alone are going to kill you. Many rental places charge extra per mile if you go over their rental limit. This can rack up costs. You are looking at about $150 - $200 per day just for the motorhome rental...not really a cheap way to travel. Many will only allow so many miles and then charge you around 29 cents for the extra miles! Checked for 14 days in June on Cruise America it will cost over $3,000 for a large RV, and that only includes 1,400 miles and you're looking at driving over 5,000 so in miles alone it will cost another $1,000+. If gas is $2.00 per gallon you're looking at another $1,000+.
Does anyone of these 6 or 7 people have a van or mini van? What about pitching tents at campgrounds?
Utahtea