staffing a 30-computer network???

Hi.

My boss and I are trying to assess how much staff time it takes to administer a 30-computer network. (Right now I’m spending about 30% of my time.) It’s an NT network with 25 PCs and 3 Macs. We’re on DSL and have a Netopia router with a built-in firewall. Nobody connects remotely — yet — but that’s something I want to set up. We don’t host our own website or email — yet — but that’s also something we’re looking into. There’s a fairly low level of technical literacy on staff.

Please let me know what your experience has been.