You are allowed to buy Quints. But you never get a mission (or at least I have not) that requires a "Quint" All fire missions I have run required a "Platform". Also noticed that the icons available for Truck companies are not accurate. There is no provision for a tiller driven apparatus but they come up under platforms and quints. Also there are a lot of graphics for ladder trucks that are straight sticks...
Not complaining....just an observation..