I've never seen a TT with a laundry chute! Or one that has a basement.
I had a Pilgrim 312bhss that had a "laundry chute", which was a carpeted cover/hinged lid on the topside of the pass through in the master bedroom. I would store a couple good sized laundry baskets under the lid and drop my laundry down into the pass through. It was awesome.
I have a sliding patio door on mine, its nice. Having the sliding door allows a lot of light to come in and also makes the interior feel more open. The only issue I have found is the dirt gets in the track.
My bunks are 74 inches long, you may also want to check the construction under the plywood. My oldest son is 6'1" and 200lbs, I had to beef up the frame and change out the plywood from the standard wafer thin 1/4" to 3/8". I also added additional cross supports, all said and done I beefed it up from about 20$ with leftover plywood.
Tell him, he may be receptive and appreciate the advice. He may have over looked his parking or he may be unaware of what could happen. What is the worst thing that could happen? He tells you to mind your own business? At least you gave him some advice that could save money and lives...