Did you know that Microsoft run a scheme that allows charities to obtain Microsoft software free?
"Computer Charity Trust is a charity with a mission to demonstrate how effective use of technology can improve efficiency of charities and not-for-profit organisations. As part of that it manages a software donations program called "CTX," which enables charities, of any size, to access free licensed software (from Microsoft and range of other partners). There're some limits (eg 50 copies of Office, 50 Windows upgrades) but the scheme is designed to be very flexible, and especially useful for smaller charities," revealed Micorosft.
There's an easy guide to getting started, and for each software supplier a specific set of eligibility criteria. Microsoft eligibility criteria for charity donations is quite wide but it does exclude schools already included in" criteria for Academic licensing.