IMHOI, I think it to be a little low. You should have been charging $50+ per hour, with your 107.
Actually, that is a super low amount, not counting the tip, as that's not a fee.
But for a first gig, you can't really justify too much, and congrats on popping your cherry (sorry, couldn't help it).
The quality of your product will get better as you become comfortable with your flying techniques, process skills, , etc., then it will be easy to state your higher rates and be confident you will deliver.
My real estate rates are relatively low, as I've stated before, starting at $75/hour, the second I start my car, with one hour minimum travel, so that's $75 right out of the gate.
I stated on here before, it's also relative to the property. High dollar property = higher rates. Last big propery I did here was $600 for 3 photos and one minute video. Maybe 6 hours total from starting my car to last key stroke on my pc.
Once being a service tech for industrial equipment, I can accurately estimate travel, onsite and process times and quote it on paper before shooting.
It easily comes out to $75-$100+ per hour, and if their local, I have no problem making a trip to hand them a thumb drive in person at no cost (on paper).
But I've got several other services and aircraft and network with a fellow flyer that has a Matrice 600 with the Zenmuse Z30. That thing can zoom into the nuts and bolts of a tower from a long ways away, and he always needs a co-pilot. It's quite amazing.
I also offer higher risk services that go up to $350/hour per person, one hour min...per person, as the perps I'm photographing will easily cut out my tongue and shove it up my arse, if they could trace where I am.