I have all mine on a rack in my studio. The type where you store the bows unstrung horizontal. I got the rack off the auction site. Well made and easy to put together. It holds 10 bows, but he also makes I think an 8 bow version and I think he also makes the type where you can hang them strung too. 10 bow version cost about $94 shipped from Ohio. You might do a search on the site I speak of
Actually, I'm fairly certain the vendor on the auction site I am speaking of is the same guy who makes em for 3rivers. You can check their site also.
Honestly, I could have prolly built one myself, but I was in the middle of getting settled in from moving into a new house so I chose to get something solid and easy quick.
4 boards joined to make a rectangle of required size and then enough pegs/hangers to hang your bows horizontal. The type where you could hang several bows strung could also be fairly easy to make. Just need the right tools.