Earlier quoted context omitted.
Not sure what you get for $12k, but know that it is possible to build an autonomous airplane, and a gopro for much less than that. Here's a friend's video for evidence: http://www.youtube.com/watch?v=rX3kFWoH17o&feature=c4-overvi... His cost is order $2000.
You can do it for less than that, even. A Naza M flight controller costs $200 ( http://www.uavproducts.com/product.php?id_product=21 ), and that's one of the more expensive controllers out there. The remainder of the components for a flying wing would run you $80-$120. You could replace the Naza M with a multiwii controller and write your own flight control program for much less. These are multicopter components but…
http://www.flickr.com/photos/bigiain/5228554566/
I'd agree that you'd easily be able to replicate 95% of what they've done for under $600 (so long as you don't count the time you'd spend researching/building/learning - FWIW, I wouldn't sell one of these hypothetical $600 autonomous camera planes to someone else for less than a few grand - my time, warranty, and liability would easily add up to that.)