I don't think they make 66KV motors.

800RPM / 12V = 66KV

That being said, you need to get a sensored motor, lowest KV possible, and somehow program the controller to really low throttle level. It may work, but you will need to know programming, or buy some sort of industrial brushless controller.

EDIT!!!! - I got it! Buy a cheap sensored controller (capable of 3S) a cheap low-turn sensored motor, and a cheap flysky radio. Set the fail safe on the receiver to a really low throttle level. Then, just turn the transmitter off! The failsafe will continue to send that low throttle signal to the ESC! It will go forever!