You need a "controlled environment" when it comes to Public Shooting Ranges! There isn't any way you know the skill, knowledge, safe weapon handling, etc. of any person entering into a facility.
Last time I went to Lee Kay this year, I was given a "bench" next to some folks that were shooting three rifles with breaks. "S.O. a B." I was pissed!! every time they shot, I felt the pressure and tasted the powder of every shot. I wasn't mad at the shooters, I was mad at the Gal that told me where to shoot from. I asked to be moved, but she couldn't because all the benches were taken.
If one were to build a range, I know it would be at least $30,000 a day just for the heavy equipment that would be needed to make it, and depending on the size it would take two weeks to make the lanes and tunnels/pits. Not a money maker at all! You'd have to build a liquor store next door to make any money.