Have you ever trained in a shoot house?
I only ask because it doesn't make sense to have an 'open to civilian' shoot house. It makes sense to run a range where the shoot house can be reserved and classes run through it, but in that case you're not setting any guidelines other than who you rent it to. If you're thinking some range officer will run folks through it then you should consider another business.
That said, there's huge demand for one.