You could provide support from home using SSL (that could be paid) :D (it is
a solAution and you can win with this).
But yes for a school that only wants a piece of software to work I think that
something already configured is good for anytime. I mean, why update when
everything is working like a charm :D
This is why I taught of a Free Rolling Distribution like Parabola, because
the servers wouldn't be "disconnected" at any time soon like the Trisquel or
Ubuntu ones after the support time, and I could even keep on updating just
what is important, letting the rest that isn't that important outdated until
it is really necessary to update it. But I may be not seeing the thing with
the right point of view.