Ever thought of a side Galley ???
Just if , you build your trailer wide enough to sleep sideways , then all of a sudden the kitchen can be in the usual side, towards the rear position as seen in “those commercial campers”
And what about the cabinetry built with a “pass through” feature , where you open a door on the outside ( awning style ) and there’s the Galley ( and the shade ) , all available from the outside too... Leaving room for side door access on the one side , the Galley door (s) on the other, and even an unobscured back entrance for maybe hauling long things ( the foamie yak’ ? ) , better utilizing the space ... or do we need a drawing ???
Still trying to think “out the box” as we’ve seen so many Very successful variations already ...
If you just can’t “visualize" it , think “Taco Truck “ ...