Thanks for the reply. The 3 switches was to use cheaply available hardware to provide 3 distinct Wireless Access Points. (Basically, 3 wireless routers running as switches, not routers).
I'm really not sure if my needs qualify as "strong bandwidth monitoring". Daily usage rates of the WAN by each VLAN seemed very simple to me - it's just proving to be rather tricky
Thanks again for the reply and the hardware suggestions - I'll look into them to see if they'll work.