I couldn't agree more, that for a small company, particularly when we're talking about a few users only, that Macs are WAY easier to support and cheaper to operate.
My experience has been (for example) at a major newspaper, where the installed base of Macs was 200+ running Quark networked for page layout and design, and a host of other software for processing images and pulling files from a variety of sources to build the paper daily on the usual unbelievably tight timelines.
There is no question that Macs were the best choice for that business, but providing support was far from trouble free.
The reality is that as the complexity of the usage goes up, so do the support requirements. What differentiated the Macs from PCs in the newspaper world was their stability-it is a MUCH more bullet proof OS than any of the Windows variants.
I'm a newbie as a Mac owner, and I am rapidly becoming a huge fan.
All I'm saying is that I've always had enough work to keep lots of tech staff employed, whether in a sole platform or mixed environment. The nature of the work and the types of problems change, but the need for on the ground expertise and customer responsiveness doesn't.
24" 2.4 Ghz iMac
15" 2.4 Ghz MBP
Life is 23