I'm not referring to the 'high tech' dark rides that Universal &I Disney are building. Most regional parks don't have the budget to build those. As
@belloq87 and I referred to in our previous comments,
we're talking about the dark rides that are similar to Snow White and a few of the other Disney classic Fantasyland dark rides. Many of these parks had almost exact, except for IP, rides in their past.
They really shouldn't be very expensive. Kennywood did their shooter dark ride in this century on a fairly small budget.