Drones on the homestead / farm

I know Grant Schultz uses them for mapping and planning purposes.  Anyone else? Any experience, thoughts? I'm thinking that a drone with video could be a useful tool for getting an overview perspective on a property that can't be had any other way.
Could be good for planning layouts and for recording progress.  Might help with recognizing patterns of problems before they become recognizable at ground level.

What do people think?

Drones could also be handy for checking out properties you are considering purchasing.
Give a quick look in hours instead of days.

I don't own one, but one sure could be handy for checking on my livestock. Right now I either have to walk or take the ATV & open and close plenty of gates in the process. Checking the livestock on my back 14 acres plus checking the perimeter fence for breaks takes up an hour of my time that I'd prefer to spend on something else. So now that I'm thinking about it, I wonder how much a drone costs and how difficult are they to operate?