I've been researching the UAV space for the past several months for solutions around real payload built on an aviation background. I have several years in operations with heavy lift helicopters. Seems a little too early for UAV with Payload as either the manufacturers don't have a sense of TBO times for their aircraft, which equates to absorbent pricing - comparable to a helicopter or the regulations haven't been progressive in this space. In the interim I've been narrowing in on Tether and Confined Space.