There is an All-inclusive tickets that includes the Atlanta History Museum, Smith Family Farm, Swan House, and the Margaret Mitchell House.
Adults: $21.50 Seniors (65+): $18.00 Students (13+): $18.00 Youth (4-12): $9.00 Child (0-3): Free
Adult tickets are 16.50
That seems about right
Get quick answers from Atlanta History Center staff and past visitors.