My brother used to work for a place that did this. Don't know what they charge but the place was called SmartSpace I think.
I helped him do his house and it was pretty easy. Hardest part is getting the cable into the attic if it isn't already there. Otherwise just get in the attic, split off the existing cable, and drill a hole through your cap and fish the new cable down to your box. You can cut the hole the right size, and not even need to do any drywall repair, just make sure it is in the right place so you can sink a small screw to mount it on the stud.
The only equipment you need is a drill with a good size auger bit(
$10 for a 7 bit set at Princess Auto), and fish tape (
$17 bucks at princess auto), and something to cut the hole in your wall with.
I also second the idea that you should fish at minimum 1 cat5 cable along with it, even if you don't terminate it, because sooner than later you will wish you did.