you don't need to wait for coops.
you could send RJ a PM to buy a SSC, an Active Hub, and a USB dongle. check around and maybe someone could also supply you with a few pixels to attach to the SSC to verify your completed setup.
You might be able to get each cheaper in a coop later (USB dongles are never in coops, btw) but you don't need to wait for them. You may want to get more of each later -- use the coops at that time for units 2+. In the meantime you don't have to wait to get started.