The Logan32 design is based on literally, hundreds of trials. The idea was to create a simple 1-floor design that was senior friendly, so basically it has no stairs. I sent my floorplan sketches to a number of tiny home builders looking for a company that would sponsor a set of plans for me. Timbercraft came to the rescue and created this great set of plans.
The plan shows a tub/shower combination, with a window in the shower area. When I was looking for sponsors, I came across a one-piece acrylic shower from Longevity Acrylics and that was what I decided fit with the intention better than a tub. A shower stall is easier for a senior to get into and out of, they have assist handles, a seat and also make sense for younger active homeowners as well. The window opening was removed in the build process, and while I was concerned about natural light in the room, the window in and above the door works well.
I asked Doug at Timbercraft if he could move the washer/dryer from the washroom into the pantry I had planned in the kitchen. I wanted the second exit so that during the tour, guests would be able to enter the front door and exit the back, eliminating the need to double back. I only planned this for the tour home, but suddenly people started saying it was a great design idea. The outdoors becomes additional living space in a tiny home, so having a door that leads directly into the bathroom, became a sensible design. I think I will continue to design tiny homes this way.