Running a BitCoin server is rather easy, and should only take a few minutes to configure. Depending on the abilities of your networked computers, you could take in a few BitCoins in a shorter period of time.
You'll need to create a file bitcoin.conf, which defines the username and password for clients to connect. This file will need to be in your Application Data folder, which was a hidden folder on my windows machine in C:\Documents and Settings\[USER]\Application Data\Bitcoin. Make sure that when you create the bitcoin.conf file, that it is not really named bitcoin.conf.text if you made it on notepad.