This seems like an exercise in futility.
I suppose you could do it for under $5,000, but depending on the rooms, I would think at least $10,000 would be more likely. I am way more with Eric and Paul. With peer-to-peer, you can save around $4500. Servers cost money due to 1) server 2) OS 3) CALS 4) Antivirus (usually around $700), 5) Backup software ($299 to $799) or can use native ntBackup, 6) BackUPS/AVR.
I have a friend who almost spent $12,000 for a server. Of course, you can spend much more.
