One rumour suggested the UK cadets are paying 240,000 pounds for the course..... Even assuming pounds and NZ dollars have been confused, this would suggest that they pay at least triple what the locals pay.
As far as I'm aware, the cadets pay upwards of £70,000 for the entire course...they then enter a holding pool and when required are sent off to partner airlines for type specific and line training at no further cost to themselves, and from there they are employed.
I am told from someone at CTC (in management) that this is what they are doing with the link operator, and that Air NZ are also going to take cadets onto the 737 very shortly.
As far as what the cost is in NZD's I have no idea.