My equipment (computers, switches, routers, scan converter, monitors, KVM switch, capture card, connecting cables, audio mixer, mics, and domain name) cost about $1200 or so.
I didn't buy the cameras, but for a professional one they start at about $700 for a good one.
As for software windows 2003 includes the media server, and the encoder is free to download from the microsoft web site. Also Ubuntu Linux and VLC can be used to web cast.
http://www.chiefdelphi.com/forums/sh...light=web+cast