I think it would mainly cost an enormous amount of time to convert it into a telescope, but if the glass is suitable (and I really don’t know whether it is), it should be possible; after all, Andrew Common in the 19th century managed to build an even bigger telescope on an amateur basis, with little prior experience of mirror-making. The mechanics would perhaps be more challenging than the optics.
As for a remote BAA telescope, I have to say, without saying too much, that Council has not been very keen on going down that route, feeling it is a service well-covered by commercial suppliers, and not wanting to risk a ‘stranded asset’ that could be difficult to manage. But we may discuss it again.