I've checked the location on chorus.co.nz/maps and it offers RBI Broadband > 5Mbps. This is probably not what they'll be used to, coming from overseas :)
What options can I put on the table for them? Solid internet is priority one, good packages (including TV etc - fairly tech-savvy retirement age couple) second. I don't know if satellite is still a thing and my last local information was when my mum lived up there and had dialup through iGRIN :D
Local experience / practical suggestions welcome. Thanks!