House maintenance costs in sea air cost at least double. Appliances and aircon rusts and corrodes. Everything needs regular painting.
Cars rust out. I buy second hand shitters and replace them every ~5 years. Certainly not worthwhile owning anything collectable or precious.
If you want a garden, be prepared to spend twice the time and money and, perhaps plants and trees still struggle or die.
I live in New Brighton in Christchurch, mostly because it is cheap housing (for no reason I can understand). Plus the coastal wind from the sea avoids hayfever (town is irritating for me).
It has a good community. Many people that choose a beach vibe are relaxed and friendly.