30% deposit is only ever going to cut out more first time buyers.. good luck saving $135,000 for a modest $450,000 property (Average price in Auckland is 550,000 btw)

Plus your only targeting 1/3 of the market by doing this. Remember property investors can use capitol from their portfolio as security and foreigners will have access to cheaper credit

(I've given up on Auckland.. Making plans to move to Wellington early next year)