Since we can't afford a professional, we've decided we have to resort to poison. It obviously wasn't our first choice, or one we came to easily. But the burrowing into the basement has gotten worse. I'm just sick to my stomach about it. So, today we try what we were told is "fool-proof" method: rat poison mixed with peanut butter, dropped into their holes.
Once we are able to finally rid ourselves of this year's batch, we have to repair damage (NOT looking forward to that!) as well as figure out a way to keep others from using well-established holes. I know that digging trenches around the deck/house area, and laying chicken wire in a "L" shape is a plan the professionals use. I'm hoping I can get my sons to pitch in on the labor and make one big "work party" out of it....undying thanks from Mom and pizza at the end of the day as a reward.