How about a Super C? Chevy Kodiak chassis and a 10k hitch. Mine is an 05 and gas not diesel. Easy to service and driving a truck not a bus. I've parked my bracket car for now while my wife, furkids and I travel the country for a few years. I'm not a Chevy guy but I really like this thing. Mileage is usually 6 to 7. I was pulling a 24' enclosed with car and motorcycle, now pulling a Jeep Wrangler. Mine is like this but a different model (6340).
Jeff