I remember as a youngster growing up in eastern Ohio being in some similar looking buildings . Sorry couldn't resist. Looks like a really simple idea that would work really well actually. See you oriented it with the big tree behind it so no problem with obstructing view in that direction since it appears it's already obstructed. Getting ready to build a pier and been agonizing over how to enclose it and something like this may just be what I'm looking for. I also have an obstructing tree due west of where my pier will be. BTW some really nice photos in you're Astrobin.
You have no idea how many neighbors have made the same comment, or "where's the moon on the door?". When you look at it from the road or the house, it does look odd being set at an angle to pretty much everything else, but the idea was exactly what you noticed, to roll toward the tree, the only obstruction in my yard.