Wow, yeah, that IS expensive!
In any case, regarding future wiring, if you'd be running new wires in from the top you could glue a raceway like this »
www.cableorganizer.com/s ··· ards.htm behind the drywall, with a length centered in every second or third stud cavity. As long as you decided to put your new drop right between the studs you'd hit the open side of the raceway.