You can always make a pull-out double bed so that you won’t block the bathroom’s path except for when you are sleeping on the bed.
I have accomplished what you debating, except for a different reason. My Overlander came with the center double bed & wardrobe combination, and we wanted center twins. Although the double bed pulls out to its maximum size, I noticed that un-pulled-out, it had the same dimensions as a typical, Airstream twin bed. So I basically removed the wardrobe, and built a new twin bed patterned after the double bed. In fact, if I really needed a lot of sleeping space, I could add slides to the new twin, and pull out both beds for a roughly 79”X96” sleeping area
But we’re stopping at two children
Tom