Requires tuning twice a year, at the same time minor maintenance and servicing may also be done. Servicing contract should be reasonable. This will take care of maintenance, major repairs and even large-scale projects one hundred years later. This is due to its simple process of operation, mechanism is reliable, and a layman can repair most of what can go wrong with it. It rarely needs tuning, maybe never.
Parts are easily obtainable from supply houses.
Amateur restorers could be found in the congregation. The chemical content of the atmosphere in the area will affect the leathers, causing them to fail after 20-25 years. Releathering is quite expensive. So far synthetic material to replace leather has not proven effective. Maybe in the future something will emerge to make leather obsolete in electropneumatic organ mechanism.