I think you have to consider that this investment will be much more "interesting" than any others in the park, as some local bosses said... iSpeed cost about 15 milion euros, more or less 22 million U.S. dollars... And I guess an Intamin ZacSpin wouldn't have such a price!
Mirabilandia has lots of space where to expand to! For example near Reset and the beach area, or behind the ferriswheel...
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Simply