The inevitable evolution of drones will be to fund themselves, personnel, facilities, and more drones. There will be increasing fees to pay for them, have a new shed on your property? An abandoned car? Do you mow often enough? is that spot that won’t grow anything on your property from toxic waste? Why is that car in your driveway licensed out-of-state? That Jet-ski in your back yard isn’t cross-referenced to your personal property taxes...your thermostat is set to high in the winter...your woodpile hasn’t been inspected for bark-moths...it never ends.
Localities and municipalities will craft new laws that are optimized for drone enforcement and their revenue enhancement.
Many assessor’s offices currently use Google Earth to see new outbuildings, swimming pools, and other major changes that might affect your tax assessment.
As long as the local populace allow them to increase property taxes for improvements funded by the homeowner they will continue to do it.
Look up your address on Google Earth and you might be shocked. I can look at the details of my garden, orchard, and even identify my cars on it. I would bet that NSA satellites are 10-20x more powerful and clear than Google Earth.