This is good math as far as I can see. These things are overly complicated if you ask me.
I wish vehicle manufacturers had to adhere to a straight forward way of telling you what you can and can't do.
The GCWR is the maximum your whole rig can weigh with all equipment attached and people, fluids, fuel etc on board. You have to check the numbers carefully because you might be able to put 2750 in the motorhome and tow 4000 lbs, but you may put those two number together and get a new number higher than 26000
That 26000 may be on there just to keep standard driving license intact rather than the real capability of your vehicle, but don't take chances. Don't trust your dealer, and keep talking to folks round here and checking the other related threads, this topic keeps coming up.
Al, Travelling with wife, daughter 5, son 3, 3/4 tons of 2013 Ram CCLB, five tons of fifth wheel Rockwood 8287SS still showing my kids north america one campground and road trip at a time.