Use sailboat tools for more durable (fridge; awning)
Use bamboo. Use rounded corners. I also liked hanging the wetsuits by the door.
Stealth mode and fan also a must
One of the biggest issues I have with a can such as this is no shower or no real toilet. I’m curious how small of a camper you could get that keeps the mojo of the campervan while being big enough to have a waste hookup. Shitter’s full!