I'm four months and six grand deep into a long range, extended duration octocopter setup, with no end in sight. Lithium-Iron-Phosphate batteries are frigging expensive. The cost of brushless motors is rising too, thanks to the skyrocketing cost of neodymium.
I don't even want to talk about what the radios cost for these damn things. It's possible to get by with just a few channels, until you want to install that (also really frigging expensive) camera gimbal, and that GPS with programmable waypoint system. All of a sudden the radio starts to compete with the rest of the build for cost.
On topic, it's a very cool video, and that sort of videography is exactly why I'm building one now. Amazing stuff.
Feel free to contact me if you need legal assistance. I have a great lawyer that helped me with an ex who violated my privacy and kept harassing me on MySpace and Facebook. He's very good. And there is legal precedent. - linuxpro
He is hold back the legion of boom - skater18000