Re: Bees entering between brick and siding.
That will be an easy cutout as far as no honey dripping. If your have carpentry skills it will be a piece of cake. They will be between the joists as was stated before. Use minimum smoke so you don't drive them deeper into the structure. A bee vac is priceless for cutouts, I can usually do a job like this in a an hour or two. I hope your charging for providing a very specialized and valuable service.
"Of all God's creatures, only the honeybee improves its environment and preys on no other species."--Haydon Brown