A very challenging situation to be in, trying to balance the cost against keeping the pricing at a level that will ensure it attracts customers.
I'm afraid I can offer no advice on that as I have zero interest in shooting at a range, if I want to shoot targets from a bench, I can do so in my garden,
the only idea I would float is maybe to have something a bit different like timed or moving targets, that might be a special attraction.
Best of luck with it.
Ditto + I shoot over 15k acres for the cost of pellets.