Orient Express world collaboration

I do like the 5-tile deep better, and although I would have preferred the 25x20 lot (too bad there's not a 25x15 one), to accommodate a longer length train car, that spacing looks ok. I only see room for about 3 sleeping compartments though, unless you put one at the back. Are those 4 insets where the doors go? If so, does there need to be doors on both sides of the train? And what about having just one door? That way the back (or right side in the picture) could house another sleeping compartment or a kitchen if it was a restaurant. Sorry if I'm being too difficult. :D