So I was waiting for an application to install this morning and suddenly remembered the "castles made of butter" question.
The answer: 720 million wouldn't buy you a castle made of butter, unless it's a very small castle. Butter is cheap as a food-product, but very expensive as a building material.
Here's all the calculations:
My biggest problem was actually finding out how many cubic feet of stone a castle had in it, until I found
this story and finally found a damn answer. A 121000 square foot castle needed 8000 tons of basalt, and took $30 million to build.
8000 tons of basalt is 16,000,000 pounds.
Solid basalt has a density of 3011 kilograms per cubic meter, or 187.9 pounds per cubic foot, if my math is right.
That would end up being (once again, if my math is correct) 106,194,843 cubic feet of basalt that went into the castle.
So to replace all the basalt with butter:
One pound of butter is roughly six inches by three inches by three inches, or 54 cubic inches. So you need 32 pounds of butter per square foot, or 3,298,234,976 pounds of butter for the whole castle.
At $3.52 per pound, you'd need $11,961,787,115.52 to get all the butter you need - enough to fund the Iraq war for 16 days, 14 hours, 9 minutes, and 36 seconds.
You could, of course, go with a smaller castle to reduce the amount of butter needed, but you'd still be better off going with stone. It's cheaper and will last you longer in the long run
