You may want to up that privacy fence. FAA rule 103 allows ultra-lights (unlicensed light-frame aircraft/no pilots license needed) to fly up to 1200 feet (and lower) right over your property and look right in your window no questions asked, no permission needed.
But contracted semi-autonomous/para-drones can't take pictures of a land owners own property with the land owners permission -- without first having an FAA permit, according to the FAA's spiel. And you can't get one! Permits are only granted to law enforcement and big foreign oil concerns flying the backside of Alaska.