Passenger luggage is stored in the embarkation airlock, just under the skylight. It's actually only about 1.6 tons, but I rounded it up to 2 for the specs. Any addition luggage could be stored in one of the vehicle bays. There's a small undercounter wine fridge in the bar area (with an entire case of Pysadian atrake. '07, the good stuff).
The hull joints for the extendable deck, deck cover, and boarding ramp can all be seen in the illustrations. The bottom of the ramp and the top of the deck cover are actually movable pieces of the outer hull, leaving a couple of inches of material to maintain airtightness. These pieces move out/down and out/up respectively (see ship section and colored rendering). The extendable deck projects straight out from the within the structure of the passenger lounge floor and is a cantilevered framework that, when retracted, would extend beneath portions of the passenger staterooms. All very buildable.
The landing gear is admittedly a cop-out on my part. I used gear I had modeled for the
Destiny Class Yacht just so I could get the project done. In reality - I love saying that when talking about fictional futuristic spacecraft - the
Prosperity's landing gear would fold up within the hull thickness and look more like the landing gear I created for the
Nirvana Class Dropship. I should've known better than try to sneak something passed you guys.