[cccp]

id say you get enough sprues to make all three of the different buildings, and then a random extra set of sprues to make the bigger building.
4 buildings isnt that much cover on a 6x4 table, although if you base them then it makes it easier for cover saves etc.

 

[cccp]

you do need a fair amount to have a decent cityfight though, or it just becomes a normal game with a little more cover than before.