For an AudioAccess system I would say it's about 2500 bucks for the controller and probably 250 per keypad. Then you need an amp.

It's a quality unit, but, if your looking for that kind of control, and don't mind about the fancy keypads...take a look at this. It's much more programmable and better audio quality. (The Director is the control unit)

[Link: audiocontrol.com]