To the OP - just a suggestion, but think about what you do regularly in Auckland e.g. weekend brunch, or shows, or galleries etc. and then ask what those options are like in Tauranga.
For me I would not want to live somewhere that small, but then Auckland has been an adjustment from London The huge influx of summer visitors to Tauranga might cause other issues, whereas the influx of visitors to Auckland is barely noticeable.
Good luck