This is spot on. I bought a Rossi Triple Black 92 (Winchester 92 action) in38/357 and suppress it with a SiCo Omega 9K.If it was me, and you just wanted a range plinker that would also be quiet and fun... I'd look at a modern day Marlin or Henry lever action (with a side-loading receiver) and suppress that. Put a red dot on top and you'd have a fun gun. Both manufacturers now sell railed/threaded models.
158gr sub 38s are louder hitting the target and cycling the action than the shot itself. .30-.40c per shot
22 suppressed out of a bolt action is also movie gun quiet. Like a pellet gun. .05c per shot (less if you already stocked deep).
Another thing is a lever action 22 capable of shooting 22shorts. Even without a can, they are like a pellet gun and my kids enjoy that as well.
300BLK is cool, but subsonics cost $0.80-1.50 per shot. Even supers are like $0.75; I'm better off blasting with a semi-308 in those cased.
The weapon / round has it's place, but it's not great on the wallet for a range plinker. I only got it because I wanted an AUG and knew I could get another barrel for $300-$400. And on my property it may make a decent and quiet wild hog eliminator.