I read all the threads and would like to give you another perspective. I had worked for the 4th largest public school system in the country (Miami) and the 3rd largest school in the county. With over 800 PC's, 50 MAC's and 3500 students and 200 staff, I did it ALL ALONE. Yes, I did, and the interesting thing was - the only thing I needed was a thick skin to deflect all the whining and moaning. I read the threads about standardization, and realized that unless you worked in the "vietnam of the public sector", you have never learned triage of problems, multitasking and prioritization of resources. I also did this before much of the remote software came out, and was in an AD environment with Win98 desktops.
I learned about certain software that "froze" the computer operating systems so you could format, delete, etc., and when the machine starts back up, it's all back where it belongs.

Network with your peers, and be inventive.