Huge Hive
The hive was too big and the house was too old. This meant that David would have to break a huge part of the wall and get inside. He would need to save as many bees and move them to another location which was extremely difficult. Usually, when he does things like this, the hives are much smaller and he can relocate them easily.
Luckily David is a professional and he likes his job. He decided to complete the task no matter how difficult it is and to get the job done. After all, he would help the homeowners and the bees at the same time.