I fly and I also have professional camera equipment. At least where I fly from, and I suspect airfields of a similar size, I am not sure you will get enough takers really to make a lot of money out of it. Sometimes my Wife and I take the cameras and the big lenses down to the airfield, stand by the windsock and for fun take high quality photos of some people landing and taking off, but if I know them I just tag them on Facebook or something.
We do take some photos at local fly-ins or theme days, and sell them in the airfield café for very reasonable prices, and there are a few takers compared to the foot traffic, and it is not enough to even begin to pay for some of our equipment. For us, we just do it for fun.
However, where you are, it might be a different kettle of fish and if you can make it work, good on you.