How else can Microsoft claim that paying for Windows has cheaper TCO than using Linux and controlling your own destiny?
That presents me with exactly two choices - either you have figured out something that has eluded every major IT organization around the world for the last 20 years OR you are wrong.
I suspect the latter to be the case.
I work in K-12 education, and we pay MS about $35/desk for all their latest software per year. With that, along with all the server software we use (it's factored into the above per desktop cost), we get Active Directory, System Center, etc. to help us manage our environment.
Please price out an alternative deployment for 1,000 desktops and laptops that provides a level of desktop management equal to the one provided with the MS solution... I'll wait. When we made a cursory look into management suites for Large Linux deployments we found their cost to be a multiple of what we were paying MS ($100/desk per year for management suite v. $34/desk per year for the MS solution suite)...