Parua Bay - Seeking advice on plumbing and water system upgrades/improvements

We've just moved into our forever home and it needs some work. I've never had to deal with managing my own water system and while I have ideas of what if like to implement, I could do with experienced advice on how to do so on a practical level.

Would love to have someone visit and explain what would be a way to help improve the current rather impractical setup.

This Request belongs to Tai Tokerau Timebank.