It depends on the day you choose for your overnight and the number in your group. During the week it was like 200 a night for up to five people and on weekends it was 350 for up to five people. If you do an overnight investigation they walk you through the house and give information. I think if you just do the tour it's 10 per person.
If I remember correctly, I think the tour was $10. I'm not sure how much an overnight is.
200 weeknights 300 weekends. They have a website with prices and available bookings
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