Honestly?
It depends on whether he is at the right time right place and talking to the right person to get a good job. He must be open minded in his job search. I've known people who can't find a job in Auckland and of people who found one in Hamilton or elsewhere.
One thing you gotta tell him honestly, if he's moving with you to NZ, he gotta accept it and not whine, but make the best out of it. You know, managing expectations.
Migration is not easy. In fact it is very hard especially the older you get. If you come to NZ, then what? And if you don't come, are you going to regret this chance?