I would like to see a small standie trailer that looks like a miniature train caboose. The raised "cupola" portion of the roof would be at the back of the trailer. Together with a drop floor, this cupola section would be a good place for the galley and the only place where a person could stand up. The rest of the trailer would have a lower roof and this would be the dining area that folds down into a bed. I would actually like the bed to be two narrow beds with a footwell between them and have storage drawers under the bench/beds that pull out into the footwell.
The exterior should have lots of custom welded railings and miniature steps to complete the caboose look. There should be train lanterns hanging on the sides and the name of a railroad painted on the sides. There should be ladders and a walkway down the center of the roof. This could be for show or to access some kind of outside storage.
I have not been able to get the proportions the way I want them yet. . . but maybe somebody else might have some ideas. I think this could be a very sweet little trailer idea.
Here is a photo of a sweet caboose to get you thinking: