Wouldn't be the first time NZ is used as 'backdoor' to Australia.. (immigration in the past)
Yeah, so long sub-300 guys have ALL the NZ CPL reqs, which include LOOONG heli XC (did it in the US but likely won't need it now), 'mountain flying training' and sling load. If one doesn't have that, it'd be costly and not just couple hours flying before skills test and passing exam or two.
And no, NZ ain't really cheaper than OZ in terms of training rates. Not much at least, for foreigners comparing worldwide rates.
TTMRA can definitely be used and it's simple paperwork filing.
I looked at the CASA CPL conversion regs and nothing in there yet, for helicopter CPL, so no idea when myself and lelebebbel can add any new rumours/expectations.