I know Stealth was very expensive (although I do not have the exact figures) due to the fact that Paramount was working with Vekoma to develop the ride. I believe work started on the roller coaster protorype around 1992 (if I'm not mistaken.)
In total, I'm sure the project cost Paramount Parks a lot of money. And, apparently, Paramount wasn't very happy with the outcome since they destroyed their contract with Vekoma.
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- Brian
http://come.to/coastconn