Remote access reduces callout fees, and improves response time. In contrast, there is little an expert can do to avoid NT reboots, draining expensive consultancy minutes. NT remote administration is underpowered. Affordable Linux software is very affordable. It is free.
Updates are then available for free over the internet.
Every hour, new versions of free software are released for Linux. But it's not necessary to keep up with the flood, except serious security updates, which are released usually within a day or two of a security bug being found. Linux books are cheaper and often more informative than WinNT books. Linux consultants are likely to be cheaper. They are also likely to perform tasks faster.