Well, think about this: The number of wires would be aprox. the same.
You would have to have Pos and Neg coming from the battery of a vehicle or power supply of a shack going to the motor in the antenna.
On top of that, you would have to devise a relay circuit to put between the RF receiver and the motor connections, the receiver is not likely to be able to handle the current of the motor, much less the inrush current when the motor is started.
On top of that, there would have to be more than one relay, in order to get the double pole isolated reversing DC needed for the motor, this can get complicated and would require some sort of solid state control logic circuit board to control those relays -- or 4 power transistors in an H config and a way to heatsink them.
A simple double pole, double throw switch at the other end of the power wires would be far less trouble, much less expensive.
And I'd bet that since the motor is run while tuning the transmitter, the high RF would swamp that little bugger, 450MHz or no, it would be dead in the nearfield. Solid state junctions, well, any dissimilar junction, which would include the solder joints, would be lightin' up, even at 5-10W tuning power. That would lock the motor control out if not destroy it.
KE3WD