People talking about NZ fast air doing CAS as though that was its main tasking - it isn't, not inthe new environment we will be looking at. You seem to forget that we are an Island nation stuck in the middle of the wet blue wobbly stuff. Unless the army can swim or fly it can't do bugger all in defending our SLOC - Sea Lanes Of Communication. It's not about stopping an enemy storming the beaches here, or about our EEZ, but about our SLOC, which extend across both the Pacific and Indian Oceans.
We don't need to be invaded by an enemy to be forced to bend to their will. They can do that by the means of a naval and air blockade. Just look at the disruption to our lives and economy that the COVID-19 crisis has caused. So have a good look at a map of the southern hemisphere and see how much we are dependent upon those sea and air lanes.
We have ordered 4 P-8A which from memory can carry 4 AShM each. Each aircraft is about NZ$400 million each and that's just the flyaway cost. For the equivalent amount of money we can acquire 3 F-16V Vipers flyaway and have some change. We would be absolutely stupid to send a P-8 into contested airspace, whereas a fast jet has a greater survival probability and is far cheaper to replace, both in crew and in financial cost.
With regard to weapons, it is NZ govt practice for their funding to come out of the operational expenditure budget, not the capital expenditure budget that acquisitions like aircraft, ships etc., come out of. They are regarded as consumables.
The NZG has looked at attack helos before, but they don't meet all of the policy requirements of the govt.
@Wombat000 times they are a changing whether we like it or not. Post COVID-19 the world will be a different place and more dangerous than it was pre COVID-19. The economic depression we are entering will be on par to the great depression of the 1930s. The US has declined in moral authority, really annoyed its allies and friends, and shown it self to be very self centred and mercurial. The PRC has proved that it is highly untrustworthy, extremely selfish, bent on dominating its neighbours and the wider environs, and its word is worth nothing. Nations are becoming more nationalistic at the moment and there are some parallels to the lead up to the 2nd world war. Whether our MFAT bureaucrats and pollies pull their heads out of the sand and recognise that is debatable, but the signs are there for them to see.