Hi Jacob,
If you're planning on wiring the house with cat5e/cat6 (and I strongly suggest you do, wifi is great but nothing beats copper for reliability), take time to consider the layout and bring all the cable back to a star point, a utility cupboard or some such. Fit a small 19" wall mount rack unit, something like this should be fine for a house such as yours:
http://www.netshop.co.uk/product/170...ith-glass-door
Then stick one of these in the cabinet to distribute as needs be:
http://www.pcworld.co.uk/gbuk/comput...98894-pdt.html
I've deployed loads of the Netgear Prosafe stuff over the years, we ran the old company on it and it's pretty much bombproof. Fit and forget.
That will take up 1U of the 6U in your rack (the U being a standard unit height in networking, actually 44.45mm for fans of specifics), leaving plenty of room for patch panels etc. that may be needed for your alarm system or whatever. UTP cable is incredibly useful stuff, always stick in more than you think you need!
Once you've got a cable infrastructure in place, you can tap wireless access points off as needed to create the wi-fi network. Maybe a couple on each floor, from looking at the photos, to keep the signal strength up.
Talking about the photos, how did you take those? Drone?
Cheers,
Plug