I think any time you combine guns with archery in a business model, you substantially increase your potential market share. Just speaking from the gun side of things, there are very limited times when I would even think about renting a gun for hunting (overseas maybe but not in the US). I imagine archery is probably similar in thoughts on rentals.

Have you considered establishing a business where you offer gunsmithing and archery repairs, etc.? It seems like you would draw more people to a business with a wider spectrum business model. If you were able to obtain enough space to offer indoor and outdoor archery practice and instruction as well as tournaments, you would probably draw even more people.

Or just ask all the guys who are into archery what market niche is still missing.