Ted,
I've been trapping for many years now. I've been doing ADC work for the last 6 or 8 years and the one thing I can tell you is, the two ain't the same!
Yes, your trapping skills will help you in ADC work but you'll need to learn so much more about all sorts of critters. In fur trapping I target beaver, coyote, coons and the occasional otter. But in my ADC business, I've had to become an expert on these animals plus snakes, squirrels, bats, groundhogs, muskrats, possums, birds, turtles, nutria, fox, moles, voles and other varmints I didn't even know we had around here. Plus, I need to know about feral animals such as dogs, cats and hogs.
My experience in plumbing and light construction helps in damage control as much or more than my knowledge of wildlife. Once you take the squirrels out of the boxing, someone will have to fix the place where they gnawed through the facial boards. I make more money on the repairs than I do on the animals. At times you may have to cut a hole in a wall to remove a squirrel nest or take out some soffit to get at a raccoon. If you start doing this, you better know how to fix that hole when you're done.
You're gonna need to learn about more trap types. Footholds and body grips are not always gonna be the best answer for you in ADC work. The public eye will be on you constantly and the type of set you make for any particular job could mean success or the end of you business.
Educating your clients will be a LARGE part of your job. They do not understand that seeing a fox in the backyard at 2 PM is normal and doesn't necessarily mean the fox is rabid. The biggest thing you'll have to educate them on is that this IS a business and you must charge for the service. You would not believe how many calls I get from folks who think I'm a free service of the state or county.
As far as what to charge, that will be determined by the area you are operating in. Make you fees comparable to other professional services persons in your area. For instance, I have a certain service charge for my plumbing repair calls. My service call for wildlife is the same. If someone wants me to do a bat inspection, I charge the same as if it were a plumbing call. Most of my animal removal jobs start with a set up fee, which will have the initial service call added in plus an hourly rate after the first hour, and either a per critter fee after that OR a fee for each trip I have to make. this I negotiate with the client. It helps them to feel in control so they don't think you're ripping them off.
I'll give you an example. Around here, a plumber will cost you between 75 and 100 dollars for the first hour. My service call is 85 bucks. So, my set up fee will be 85 dollars for the first hour and 50 for each additional hour after the first. Most of my jobs take about two hours to set up which means I get a 135 dollar set up fee. Then, per trip or per critter afterwards is negotiated with the customer. It's easier to sell a per critter charge as that puts the pressure on you. If I sell a per critter charge and catch nothing, then the set up fee is all I get out of the job. BUT... The customer is still satisfied with that because you tried your best and maybe the critter just moved on. When I do a per trip charge, I know my gas and labor are covered but I try even harder to make catches. Come up empty handed and it starts to look bad on you.
Guarantees: A lot of guys will make all sorts of guarantees for this or that. I don't. The only guarantee that I offer is any animal that I haul away will not come back. I can not guarantee that other animals will not move in or other critters will not chew out the facial boards in another spot. These are wild animals that we are dealing with and they have minds of their own.
Let's see.... Did I leave anything out? Oh yeah! Equipment. You're gonna need more than just a good supply of different types of traps. Ladders, short, long and step ladders are a must. You'll be working way off the ground at times and in ceilings and such. A good chain saw for trimming limbs back from roof tops, skill saws, drills, hand tools of all descriptions for home repairs, nut drivers, wire cutting pliers for forming cages, excluder valves and a good caulking gun and a foam gun are good to have. And a good dependable flashlight is a must.
Not telling you all this to discourage you from it. Actually, I enjoy working in this business. It can be quite rewarding at times. Just be sure you know what you're getting into. Get yourself certified and learn all you can about every type of critter that you have in your area because you will get calls on all of them.