IMO check the laws regarding trapping for your area
first thing off the bat.
Every place is different as far as licensing and
seasons and trap types and dimensions, etc.
from what I understand
Here I can pretty much use whatever I want and
do whatever I want as long as I'm not harvesting
for sale any of the animal

If you have varmints molesting your livestock or
property and you're squeamish about dispatching
them, you might consider allowing a trapper to
come in and handle it for you

Good Luck