It's a bit annoying about Centex telling you don't try wiring it up. It's so much easier to just pull the wires when it's still under construction. No chance of offering them a couple cases of beer or something to overlook it?

If you're really serious about it then you'll want to have conduit. And inside that you'll have several runs of Cat6 to each point and a nylon pulling cord if you ever need anything else.