A colleague has one of those RC helicopters. It is quite amazing, it can carry a 5DIII with WA lens, it is stable, flying route and camera angles can be preprogrammed with GPS or adjusted in real time, there is a video feedback etc. And it costs only about 2000€ fully equipped (minus camera, of course). In Finland at least it needs no permits of any kind, as long as it is flown in full sight and not too high (200m or so).