I agree that it's a great memorial to Mark Twain (the house more than the light tower), and I have to give them credit for that.

My grandmother, Caroline T. Harnsberger, wrote several books on Twain (his daughter, Clara Clemens, called her a "walking Mark Twain encyclopedia.") and provided Hal Holbrook with guidance as he developed his one-man show, "Mark Twain Tonight!"
The amount of research she did over a period of 50-plus years was amazing...all typed on 3 x 5 cards with an electric Smith Corona and meticulously filed. I thank her everyday for passing along some of her writing DNA to me.

Were she alive today, she would undoubtedly give Hannibal a big thumbs up. So that's one on the plus side.