I used to walk with the pest control at my previous job. They use glue boards, snap traps, copper wire to plug holes (mice can’t chew through it easily). A little trick they did was putting the snap traps in dog food for a few days before putting them out. If you can fit a pen through a hole then the mouse can fit. Also - mice are creatures of habit. They run along walls, if you have a real issue you’ll see rub marks. I’ve been told they don’t typically leave more than 30 from the nest. Hopefully some of that helps!