I feel for you. Depending on the size of the hive you will probably have to remove most of the masonry. Disclaimer: I have some experience with masonry but I'm not a mason. I do carpentry work. If the majority of the entrances are on one end I would start there. You will probably have to take of the dish and the top caps. Then you can start taking off the runs of brick. A good pry bar should do the trick. Just start stair stepping the runs until you get the cut out done. You might not have to remove much in the back. I would have two or three people with strong backs and weak minds. You will be moving a lot of weight.