Check the website. Its not a cheap ticket, but they do offer free admission to specific buildings on specific days. Very much worth the visit though
Is this tour on a bus or are you walking?
First you need to purchase a pass to enter the museum grounds. The two mansion tours are additional, but are definitely worth the cost. (I don't know what that is for non-members. For members, Mable's is free, John's is $10.)
10.00 to 30.00, depending on how long the tour is. I've been twice to the complete one. I recommed it.
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