Clever the way you have integrated engines with wings on those transports.
However, on the jet hydroplane, I would crank the wings in the other direction because bolting the wings' center section directly to the fuselage would shorten load-paths and reduce interference drag. Then crank the outer wings upwards outboard of the engine nacelles. High outer wing panels will whack fewer docks, trucks, fork-lifts, etc.
The greatest challenge is making it maneuverable enough to reverse onto docks so that it can unload straight out the back end. Thrust-reversers pointing up, over top of the wings?
Either way, you still need to keep engine inlets well above the waves to minimize water-ingestion. Floats will help reduce spray directly into engine intakes.
Sorry dude, I was not trying to tell you how to draw your pretty pictures. ..... Instead, I was looking at your sketches from a truck-driver's perspective and trying to figure out the easiest way to unload cargo.