If you have 2 door on one side and 1 door on the other, I would think you are loosing precious space. I can see having one door on each side. But 2 on any one side with a 3rd on the opposite side, is bit much .... space that should be use more wisely.
I've seen factory built trailers with doors on both sides. They are not common, but they have been built in the past. One door is usually on the curb side near the front, the other door is usually on the street side near the rear. I liked those designs, but after thinking about it, I've never been to any campground where having a door on the street side would have been of any benefit or convenience in over 50 years of camping in the USA.
