The mill means technology, it's easier in develop and interpret houses than restore and interpret mill technology. We can't save them all and some are not worth saving. It may be impossible financially to save a mill. But that does not mean we should write them off. Don't go about restoring a mill by setting a the bad prescient and spending more money than anyone has ever spent before.
Mills maybe be expensive to restore but why spend more money than is necessary.
Gone is the romance and love about the past which in the early part of this century, mills were converted into tea rooms or homes. In later years some mills were converted into feed mills, but now feed mills too are also disappearing. If we don't find other uses for mills, such as mill museums, art museums, etc., mills will become a thing only of the past. We need watchdog groups interested in old mills, like the grassroots organizations for covered bridges and steam railroads. The teenagers across the country have all ready found mills as abandoned structures as places to recreate in.