Chances are you won't be comfortable driving it further away than the stock range allows. Even the low-end AM radios that come with RTR vehicles have pretty good range.
When you get it, do a range check. Get a friend to stay with the car, and you start walking away. See how far you get before you lose control. (Don't do this with the car running, just leave the engine off and have your friend watch the wheels and throttle servo)

You'll probably be impressed.