ever thought of simply using one of these drones:
it uses a Movidius chip
"Just like the Myriad MA2100-based Phantom 4 released earlier this year, the Mavic Pro is able to sense and avoid obstacles in front of its path, hover in a static position without the need for GPS, and automatically follow subjects through advanced machine learning algorithms. "
also seems to have a 7km range.
seems to do more or less what you want. I'm sure you could hack it to provide any extra features you need. By the way if you do, post a project here with the hack :)
2017-04-10 16:05:36 UTC WeepingAngel - 38 points