JMHO, but if towing a car with us was not an option and we had to rent a vehicle when we got to our destination...We would have just stuck with a towable RV and tow vehicle. Not having a 'toad' with you and having to rent a vehicle, IMO creates so much 'PITA' (pain in the ***) that you're really better off going with a towable RV (5er or TT).
As already said, the extra fuel you burn when towing is usually sooo small, it doesn't really enter into the equation. The much bigger expense is the expense to get the towed vehicle set up, and get all the hardware needed to tow it. I don't doubt that in some cases you may actually save $$ renting a vehicle instead of setting a vehicle up to tow, but I just would not want to do that (rent). Like I said, I'd go with a towable RV before I'd do that.
