True about the $$'s, but it gives you a lot more options with toys... which, considering you can't triple tow in the east, is a huge consideration.
You get your truck, a decent living option... and depending on the length of the enclosed trailer you tow, different options for toys.
Going to a place with lots of room... tow a 20' or 24' trailer that can hold motorcycles, jet skis, 4x4 ATV's, and/or even a small car.
Going to a place with limited access, like Arlan likes... just tow a smaller trailer with the toy of your choice.
It's an nice option for the casual RV'er who takes either occasional or frequent weekend trips, and maybe one or 2 longer ones per year... but for those who like to stay out for longer periods of time, they still leave a little to be desired. At least, in my opinion.