Last time Ansett/Qantas tried this it wasn't until the creditors report came out that it was obvious no one running a turboprop against AirNZ has ever made any money doing it. The accountants spun the numbers for on-travel pax to make the turboprop operation look better than it was.
Good luck and hope there's lots of new jobs but unless the main trunk is happy subsidizing the turboprops, this venture is doomed.
There isn't the population increase outside of Auckland over the past decade to change the numbers much from 10 yrs ago.
But , as I said, good luck anyway. If you're unconvinced, have a look at the creditors report for AnsettNZ/Qantas NZ and crunch the numbers.