Me and 7 or so friends want to take a summer road trip through all 48 states. Can we have some advice? We plan on using a very little amount of money and doing it quickly. How long should it take us if we don't do very much stopping? Should we rent an rv or rent multiple cars?How much would each choice run? Do you have to be 21 to rent an rv? Any answers or general info for us would be greatly appreciated. Thank you.