Are you going to give them time to rob the house after removing the cone?
I wasn't since they had only been there for less than two months. I doubt there is much honey to rob. Am I wrong?
If there is only 5 pounds of honey in there how many ants, cockroaches, silverfish, mice, etc will it feed? How long until if finishes being eaten, fermenting, oozing out of the wall?
I bet the homeowner would want you to finish robbing it out.