If we're talking JGP, can Auckland or Christchurch get one too?Smaller events like JGP, definitely Providence,RI. It is attached to a hotel and a mall. One stop for all.
NZ isn't as remote as many people think - about 12 hours' direct flight from major skating/transport hubs like Tokyo or Vancouver , which is comparable to the distance from East Asia to Europe. It would be convenient for smaller-fed skaters from Oceania/SE Asia/South America to attend, but also likely to attract some strong competitors (e.g. like how JGP Brisbane had Trusova).
Australia is usually the go-to during the rare instances when the ISU decides to host an event in Oceania. They are certainly the only Southern Hemisphere federation with the infrastructure and resources to support a big event like 4CC. But a JGP stage, without much need for a large audience capacity, would be feasible in NZ and, I think, well-appreciated
JGP would also coincide with the cherry blossom/birdwatching season!