At the risk of sounding like a dick, I think you'd fail, and lose a shitload of money in the process. Don't do it.
We've already had two gyms go under, and the Y and WWU walls are heavily subsidized by the institutions that manage them. The Y, for instance, is staffed primarily by volunteers who exchange their time for access to the wall. No successful business could adopt this model, you'd have to pay employees, their L&I, payroll tax, etc, not to mention all your other bills. If your expenses are, say, $8000 a month, you'd need 160 paying customers to break even. Good luck with that.
There aren't enough climbers in B'Ham that would be interested, IMO, and we are in the shittiest of economic times. You'd lose your shirt.