Caution, an open mind and a good lawyer (just in case) are probably all thats needed...
Surely there's no harm in finding out more about this type of thing initially, and trying to figure it out once more facts are available.
Afterall, for years pilots in NZ GA have been bonded for a similar amount (over 2 years) just for jobs on BN2's, so why not for a faster, light twin in a foreign country...
It is a bit strange that it appeared on Seek though rather than a standard pilot recruiting site... definitely agree it is strange to want to operate ZK- rather than N-, and if not ZK-, the need for NZ pilots...?