I suggested leasing back the organs to the parks for a specific
reason. If resold to the parks, once they malfunction, they will
be silent once again. If they are sold back to the parks, then
some kind of maintenance agreement with the restorer is needed.
This is what I envision: Regional groups of AMICA, COAA, and
professional organ restorers approach the parks with the idea of
buying the organs, restoring them, and either leasing or reselling
them back to the parks, with a long term maintenance agreement.
Then either the regional members tend to their area organs, or a
team of restorers travel the country one or twice a year to perform
This sounds more professional and businesslike than a bunch of
volunteers working on the organs. Not only that, with the above
arrangement, long term up-keep is assured if the parks are agreeable.
Even if only one park agrees, it's better than nothing.
Remember, the lease should be attractive to the park, but should also
make the restoration efforts worthwhile and up-keep practical.