Back in my research days the thought of carrying a bike was in my head too. My aspirations were much more modest. I had a Yamaha TW 250cc in mind. Bike dry weight is about 260#. Checked with Carriage at the time to see what they thought.
Their answer was nothing over 300# bike & carrier combined. Scrubbed the thought. No way for a toy hauler. I like my inside human comforts too much.