While I respect the budget pressures of K-12, I'm not buying that an extra 10 MBytes/user on student-grade SAN/NAS storage is even measurable, let alone significant. Storage/Bandwidth cost curves have been remarkably consistent on their shifts over the last 20 years.
You might want to re-evaluate where you are focussing your energy on optimization.
You might want to re-evaluate where you are focussing your energy on optimization.