Take what a professional camera man (or woman) would make for a night at a concert (probably a couple hundred to a thousand or more, depending on the concert and what the video is going to be used for), then times it by 1.5 - 2.5 for specialized service, then deduct $25 - $40 for every battery you don't have to film the entire show. Then consider the Facebook and YouTube marketing aspect of the Inspire 1 and what a crowd pleaser at the concert it will be and tack on an extra $100-$200 for that. And then just scratch the whole idea, because you shouldn't be flying above a bunch of people at a loud, distracting, and disorienting concert.