JMO??? It won't work... the bees have established themselves between studs. Drilling holes several studs (and around a corner) away from their known entrance won't do it. They will find an exit more convenient for them, and likely less convenient for the builder. Remember, it takes LESS than a pencil width. Is the contractor truly as 'allergic' as he says, or is he remembering the yellow jacket/wasp sting as a kid? Not worth the chance, really. IF he is allergic as he claims, I would do a VERY calculated cut out, saving every last bit of brood comb and stores as I could, if they are indeed going to proceed with the build at this time. I do a lot of removals, and I always do my best!!! Bottom line though is you truly can't save them all.