I have a 3 bedroom apt in an old mill building. Most expensive was 3 years ago on a 50 day cycle (no idea why) and it was 998$. Cheapest in summer was about 95-115. Now I’m on a budget plan and pay 289$/month. We have electric heat as well.

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!