My neighbor returned after years of renting his house. The keys only work on the dead bolt maybe because the renter changed the locks on the door knobs? And his garage door remote opener doesn't work. So then his wife inadvertently locked the garage door so they can't get in. He's too cheap to hire a locksmith and wanted me to take a hammer and knock the knob off. I don't want to damage the door. Can I drill it out or any ideas how to break in?