"Assuming" the FWRHS sees at least some of the money you spent its well worth it.
Yes,at first consideration it seems like alot of money to watch a train go by. IMO, given the thousands of volunteer hours that have gone into restoring,rebuilding, maintaining, and operating 765 a couple $20's isn't too much to ask.
Rich and others can clarify, but I don't think anybody on the crew sees a dime for themselves,keeping that locomotive operating is no small task, and they do it because they want to.