Please Help

[Dominator_Legen]

Hey,
My project is rover that remote control (minimum distance 500m) that used to relay a real time video and sound and sensor reading to the operator, then the operator send to it an instruction, depend on the sensor reading, these instruction used to move the rover or to stop it,... etc.

I need a little information about the remote control robot from long distance (minimum distance 500m), and information about the transceiver used to achieved this requirement, and please if any body know how can I interface the transceiver with the robot (I already know that the transceiver on operator side have 3 I/O, one for video and other for audio, and the last one is the serial port plugged to pc), but what I don't know what happen in rover side what is interface, and please if any body know where can i find a cheapest transceiver on net that have the above features,

Thanks In Advanced For Whatever Help