Before we bought out TC, we talked about all types of RVs, including Class-B's. One reason we did not purchase any type of motorhome is that when your engine has mechanical problems, you lose your home as well as your vehicle while it is being worked on. With the TC, you can always have it dropped off at a campground to live in while the truck is being worked on.
This one factor is why we do not ever want a motorized RV. Also the cost of class-B's is too much as compared to the rig we put together 2014 Ram and 2013 TC = $45K, all new. No class-B can be found for anywhere near that price, when new. Of course some truck/TC combinations can cost as much or more than a class-B.