I would like to see one of those with an outside seat on the front and some fishing pole holders on either side. Now add a motorcycle/VW engine and a motorcycle front end making it into an RV/Camper/trike!
Pull it with your bike? Maybe if it had electric brakes.
380 kg = 836 lbs That's pushing it a bit behind a bike IMHO. Kind of a cool concept though. I wouldn't expect a very big following though. Combo vehicles never seem to do any one thing well.