The two indoor ranges close to me, (both owned by the same people) charge $14/hour.
I despise indoor shooting, earplugs AND muffs is barely enough hearing protection indoors. Baffled outdoor ranges are nearly as bad not to mention that you are only allowed to shoot rifles off of a bench.
Nowdays, I gladly drive 50 extra miles to shoot at an unbaffled outdoor range that allows offhand rifle shooting. $10/shooter, bring as many guns as you like and stay as long as you like.