We are all but guaranteed a WC spot under the new format which starts after this cycle. I don't see us going back to the bare bones.
You are probably right, but some risk spending based on the promise of a future large cash windfall, ie 2026 WC qualification. Remember the Horror in Honiara. Or what if FIFA completely change their mind, and stay with a future World Cup of 32 teams. Both unlikely, but could happen.
Anyway won't be such an easy process, finding quality AWs friendlies in the future, as all the Confederations setup Nations Leagues of their own. AFC teams busy with their Asian Cup in 2023.
And without AWs being involved in say a AFC/OFC combined H&A Nations League, there will very rarely be any quality teams playing in NZ (very few want to travel all the way to Aotearoa for a friendly over a 7 day FIFA window). And that's the real bane of contention, AWs playing so rarely at home. Not an easy fix.
In 2023 NZF will also likely switch a strong focus to the Football Ferns in buildup to home WWC. U20 WC in Indonesia next year, will likely be main focus of men's game in 2023. An age WC in a pretty good viewing time zone, hopefully. Though night kick off games could be past midnight in NZ.