If you want prolonged flight times, you will need to use either a gasoline or a larger nitro powered helicopter. You will also need some type of autopilot. The Co-pilot from FMA direct will stabilize the helicopter and allow you to hover for thirty minutes without becoming disoriented. It is very inexpensive last time I looked it was $130. The co-pilot works with helicopters and uses four infared photodiodes to detect the difference between sky and ground. It can easily stabilize and hover a helicopter. Remember you will also need power for the radio, auto-pilot, gyro, etc. To get enough power, you will need a larger helicopter than a small electric. Next you need to think about cost, this vehicle will easily cost $1500.