> which is actually quite basic - pest control is a big, good business to be in and it's possible to build a very big, profitable business by doing the simple things right, consistently.
I would have thought the opposite because pest control is the easiest thing to DIY for most people. All the insecticides and traps and knowledge for what to use is available online, there is usually no emergency so research can be done, and no technical skills to learn most of the time.