I helped establish one in the town I was living in in MN about 10 years or so ago. If you have the space, the cost is realatively low. Cities already have insurance that covers the liability portion.
Local archers built it, city maintains it still. Biggest problem centered on compound and crossbow guys wanting to stand at 20 yards and burn holes through the celsor bales.
We had it set up with a back to back shooting line, 10,20,30,40,50 one way and 15,25,35,45,55 the other.
Vandalism also can be an issue but that's true with everything in the parks.