I think NZ should just abandon its army all together LOL. By the time any opposing force landed on NZ it would be all over already. It should instead convert the army personnels into navy and airforce.How about leasing one of the Aussies older ANZACs? Would help us by gaining an extra frigate at small cost, and as Oz navy is worried about been able to crew new AAW destroyers, would provide extra crew for them.
Though as NZ is having problems crewing its current fleet, may not be all that useful.
Maybe NZ should increase its number of trained army reserves, both for combat and support roles. They already provide round-out for regular force units, but should be increased to provide a number of fully reserve units, say 2-3 full infantry battalions and 1 mech cav squadron, plus a 2-3 each artillery batterys, and 2-3 airdefence troops. NZ would have to purchase extra equipment for them, but would have a well trained force, that would not have to be paid fulltime, or provided with barracks, food etc, fulltime.