There are two important aspects to look at when it comes to commercial wildlife control. First off, you have to remember that it is a business and as such needs approached as a business. That means registering with the State, having business insurance, advertising, figuring out services you want to offer, pricing of the services, equipment expenses, office expenses, salary, taxes, invoicing, collecting payments and more.
Second, keep in mind that trapping is just one of many services commercial wildlife control companies offer. The number one service we have is customer piece of mind. To achieve this, we may trap an animal, shoot an animal, provide harassment, perform exclusion, remove carcasses/feces or just talk with a prospective client about their problem to confirm it is a problem or answer questions on how they can do it themselves (consultation).
You don't have to offer everything and many times services will be based on whether the problem is in a rural, suburban or urban area. For instance, coyote control at a ranch will have different services than removing a bat colony in a downtown building. This also means that you'll have different pricing structures based on what and where you perform services.
It's a great field to be in, but do your best to keep an open mind and get as much information as you can through videos, training, reading and talking with other operators. I have several tutorials for wildlife control operators on our YouTube channel at https://www.youtube.com/channel/UCWouTIK7B1SlXDaXhev5akQ
with more being posted.