Unless it is a jet-powered drone, it won't reach the altitude. Rotors stop creating uplift at some height, because the air to create uplift is far too thin. And

Unless it is a jet-powered drone, it won't reach the altitude. Rotors stop creating uplift at some height, because the air to create uplift is far too thin. And if you are able to build a jet-engine -- well you could basically call it a guided missile system. You'd need a launch facility, lots and lots of fuel and you'd be detected by ATC once you launch (if you haven't already been detected procuring resources to build the thing).