Instead of following someone else's lead (all of the above sectors are already well saturated with many drone owners chasing what few commissions there are): identify 'niche' markets and specialize.
A good start might be getting certified as a...
Hi George, I’ve seen drone related commercial industry jobs advertised on Indeed.com - some were pretty local to where I live but that’s because I live in an urban area. You may need to travel a bit for yours. Good luck with that!