Weight is part of the transition.
You have a cab chassis that has a GVWR of 11,030lbs including the upfitting and OCCC, with a 5,000lb towing capacity, and the combined weight rating for Sprinter based motorhome plus towed, all loaded for travel, should be kept under the GCWR of 15,250lbs. - It can be done.
I went from a 2016 Sunstar 26HE to a 2018 Navion, and we pull a 2016 JKU Sahara Wrangler 4 down with no problems. All Blue Ox equipment used to setup for towing, and has performed well.
Our average GCW loaded for travel is usually about 150lbs below the 15,250lb max GCWR.
EDIT: We average around 15mpg solo at freeway speeds. Slowing down does increase that number. We average around 13mpg towing the 4500lb Wrangler. Same speed scenario.
