Here are other shoe organizers. I really like the Lazy Susan/Lazy Shoe Zen design. It wouldn't be hard to DIY and you could make it as tall as you want.I would have the shoes facing the other way so I could see the fronts of them.
One of my favorite organizing hacks I use on vacation, suction cup hooks on the side of the RV to hold our towels. Each towel color is assigned to each person so we know which one belongs to which person.