We had a 60 server VINES network run by two administrators, plus the PC support team (about 8 people) who did general PC support as well as network support. We could have doubled our server count without needing any more administrators.

At one point we got bought by another company who used MS LAN Manager and MS Mail. They wanted to migrate us to their MS Mail system and could not get their head around the fact we didn't have or need dedicated email administrators. The senior network admin wanted to take a month off work just to watch them try to migrate us. :-)

Wade.