I think you may be surprised Algie. Certainly labour costs will be much more overall than those employed in Wales. I think it will be more than the predicted figure as steel prices have increased. There is also the site preparation costs and am I right in thinking that Liberty Stadium was, despite some unsuitable ground, was much easier to build on than sloping farmland.
I don't really know to much about the overall picture on the Liberty ground, but it does look impressive from the outside.
http://www.footballgroundguide.co.uk/
The roofing looks alot better as well.I'm not knocking Falmer but when you compare it to that ground it does make you think