I've been thinking about a stately home, super base, Steed's house type of model for 7TV for a while, and then came across the Dust Tactics Warzone Tenement. It is absolutely perfect as a basis for that sort of model. The modularity of the design makes it great for loads of other uses, too. So I'd highly recommend it.
But more than anything, the sheer amount of plastic you get for you money is insane.