My experience with trapping was quite limited. I found a pretty small trap in the woods while metal detecting decades ago. It hung in my storage shed at the cabin for years.
The family that had the place south of mine sent their son over asking if I could come help them. I went over with him & they explained the PO of the cabin had put a cheap, crappy looking skirt on the place (pier foundation) and they had decided to replace it. That's when they found out that the PO had never hauled off or burned any garbage for years, and had just stuffed it under the cabin. As they pulled it out, rats went everywhere. So everyone geared up with shovels, rakes, clubs, BB guns, and my semi auto .177 pellet pistol. We pulled garbage and tried to kill rats for hours. We killed 35 or 40, with about that many running off into the woods. By mutual agreement, we picked a spot on my side of the property line and set that trap. He & I checked it constantly and we probably killed another 20 or 30. (and nothing but rats)
Then one of the area busy bodys got wind of us using a trap, and sent the family & the owners association nasty letters complaining we were "killing wildlife with cruel traps". We stopped using the trap & the guy next door bought a humane "live trap". He caught a few more rats, which he then released under the busy body's house or in her garage.
Ended up selling the trap in an antique store, think I got $40 for it.