mate very easy to do. I basically ran hard wire points from router room to upstairs theatre room and other halfs office and my office. down stairs ill stick a wireless router on and upstairs if need be but chances are one router will do the job as the wireless is quite strong.

just run ya cat5/6 cable to where you need it if its a 2 story home you have a lot of planning and prewireing to do . single story not so bad as you can access roof area later.

Mate if you need a hand let me know i just wired up my whole home which i just got built. well worth the effort later if you do it during construction too .

Tim