My husband and I really watch our money, so the $20. per person entrance fee was considered before going here. We had heard so many people say it was a 'must see' that we finally decided to go, and I am glad we took their advice.
We took the self-guided tour and the hand held 'audio guide' worked wonderfully. (Check before you leave on your tour to make certain that your device is working.) Also, go early in the day when there are fewer people, especially if you like to take pictures. (By 11:00 am the line to buy tickets went all the way back to the parking lot!) You are not allowed to go into the homes on the self-guided tour, but the houses all have open doorways allowing easy glass-free access for taking photos; even flash photography is allowed. The grounds and buildings are beautifully maintained, giving you a realistic idea of what life was like back in that era. Now I understand why they charge what they do in order to keep the estate looking in tip top shape.