Welcome to the club; I'm a newbie as well. I'm at exactly the same stage you are. The Mini 4 K is the best entry level, top teir drone; especially if you want to capitalize on your skills. I can't think of a more challenging, rewarding, and fun...
That is a cool gig you have! I'm also a photographer, focused on landscapes, animals, and sky art. Lately, I started shooting some 10X macros. I have a Mini 4K currently. After I aquire my part 107 license, I'll put it to work. If demand grows...