As compared to the cost of the equivalent 250,000 men per decade? ( 3 decades in exchange for 750,000 men) I would say that was reasonably short.
What would your life have been worth?
The claim was made that slavery was on its deathbed and would have died out within a very few years without the Civil War. I'm still trying to find out why you people believe that and you all keep throwing out irrelevancies. If you can't answer the question then just say so.