the registration on my 2011 TT is less than on my 2010 F150, of course it cost half as much too. I love the fact that the TT has a flat floor. Never been in a C that had a completely level floor. Maintenance on TT is less complicated that a C because you don't have engine, transmission. Refill of propane is also simpler, just pull bottles and take to dealer, don't have to drive whole vehicle.
I think driving the Truck pulling the TT is easier driving; I found the cab-over distracting when driving. Also the body was wider than cab so looking out the mirrors was also a bit confusing. Backing is another story. Never backed the MH except into and out of yard, made sure I had a pull through site. I have backed the TT into a number of sites, some easily and some were a real challenge.
I think I prefer TT over Class C; however, when I go fulltime, there are a few C's (much larger) that I might consider, especially if the price is substantially lower than the Class A I plan to buy at that time.