I'd still just use wifi. I had a similar issue with my desktop machine and just bought a USB wireless adapter. You can get them for a touch over 30 quid (the UTP will cost you for faceplates etc as well). My time is too valuable to start installing cables that just don't need to exist. I can also shift my machine easily when I need to. Unless you are shifting huge amounts of data regularly, even 11Mbs is ample, let alone the faster versions now available.
Christian.
P.S. I ran standard UTP on the outside of my parent's house about five years ago. North facing wall. Still works perfectly.