A difficult situation, but one that has been ongoing for a long, long time.
I hope it can be resolved, but having read through the correspondence, I have to say I am not hopeful. Retrospective planning is always difficult to achieve - without considering the proposals for the new buildings.
GAM are, in my opinion, one of the premier organisations for active restoration of such aircraft, to keep them in as good a condition (and operable) as possible. It would be a serious loss to aviation preservation if it were lost.