Take all of those panels, doors, covers and checker plate off the bottom section and you've got heaps more load carrying capacity.
It has some potential.
The top section looks like a better take on the old 'roof top tent over a normal boat trailer' idea that we've seen a few times.
A slightly lighter boat trailer would be a better idea too. After all, it's the main trailer doing all of the Ks, the boat trailer would only be doing short trips to the ramp and back in most cases.