Gas or Diesel?

If you're going to tow an enclosed trailer down the road you may want to reconsider going with a gas Class C. We bought a 33' Jayco that was like brand new with the Ford V10 and it's a very nice RV. Our set-up includes a very light race car and open Big Tex trailer (total package is under 5000 lbs.). Also, we just bracket race local so everything works well. However, after we purchased it I did some research online thinking that we may want to pick up an enclosed trailer and many folks are saying that with the long overhang behind the rear wheels you'll tear up the RV by using an enclosed trailer unless you have a trailer toad and/or beef up the suspension.

Also, aren't diesel repairs typically more (much more) expensive? I know that price of diesel around here now is crazy high.

Scott