12k is a lot of money, not sure if it's worth it or not, but your see a lot more 25# ers than 100's.... Might be worth it for someone though. Not this guy.
What kind of hammer are you building Tom. I want to build a Clay Hayes style tire hammer someday, but with the Gary Huston height adjustment. I think i'd get more utility from a forging press though, so I'll build that first.