Honestly? I wouldn't touch this, or any of the other regional (eg Moree) places you mention. I see a real lack of growth drivers in all of your nominated areas.
Norfolk Island is about to become a mendicant territory - dependent on other Australians - a bit like Tasmania if not more so. It is losing population. https://en.wikipedia.org/wiki/Norfolk_Island It will also lose self-government, become subject to our taxes and get Centrelink. http://regional.gov.au/territories/norfolk_island/reforms/