As an event host, we'd provide feeds to racers vehicles, prizes, course design and setup, logistics and all the other things necessary for a smooth running event. Of course we'd provide alcohol and awards like "Best Crash" One of the challenges is that the cost of the quadcopter/drone might be prohibitive for casually interested people, but open to ideas. Maybe we could organize a group buy and save some money for participants.
https://www.youtube.com/watch?v=NsxyV-kgfio https://www.youtube.com/watch?v=H19z1X3V4UQ