I am also in 'construction' but I like the idea of clean lines and great views. I will have to consider where I can hide a tank / tanks, but equally I can see a benefit as described, long term with the cleaning arrangements.
I wondered about pH too... does anyone 'treat' their water if it is too acidic / alkalii?
I would imagine acidic water could play havoc with some fixtures and fittings, even the tank itself if not, but maybe its negligable?