Yeah they spended a lot; lets see;
De Vliegende Hollander (2007): €20.000.000
Joris en de Draak (2010): €12.500.000
Raveleijn (2011): €30.000.000
Hartenhof: (2013): €42.500.000
Aquanura: (2012): €?
So in 5 years they spend: €105.000.000 aka $149.887.584,31 (Excluding the newly build fairytales, like Sprookjesboom, Meisje met de Zwavelstokjes and De Kleding van de Keizer; wich adds a few more million to it.)
Not bad for a themepark without a big backbone company.