perplexity.ai says (with references) that for New Zealand it's 5M NZ or about $2.9M USD minimum investment, into things that benefit the NZ economy
perplexity.ai - New zealand golden visa progra uTPrchDuSXiXDeR
I don't think I want that much tied up in strictly NZ investments. But potentially there may be good deals, one would need to spend some time there first to get the 'lay of the land', which would be a good idea in any case.

Actually, at first look Monaco seems easier. perplexity.ai says (with references) that the requirement is to maintain 500K euro in a bank registered in Monaco
perplexity.ai - Investment required for u s ci
Not sure if there's reasonable interest on those deposits, or other investment opportunities for the deposited funds.
A long stay type D French visa would be required, but they seem to let Monaco show proof of funds.
I looked into living in Monaco a bit, it does have its attractions!