All that is really needed to live in Hawaii is a bed and a roof with or without walls, preferably only half-walls if any. Keeping the mana flowing is paramount in a place to live, especially in a place that is perfect temperature for the human body, between 75-85 degrees year-round.
It helps to have a mosquitoe net, but this is not as necessary once the home is up off the ground.
A treehouse is best type of home I have ever lived in. There are thousands of different kinds and styles.
Regardless of the design, the following are key amenities: solar power or other source of renewable energy, water catchment, compost, garden, garden tools and a treehouse building and repair kit.
Using available materials and land we build one shelter after another. This is habitat for humanity built and occupied by staff, student and clients until permanent dwellers move-in. Then we build some more elsewhere. Simple, sustainable, holistic designs that are in balance with the ecology. Where possible, most or all of the materials used are host materials, meaning they are readily available on-site or close-by.
Much more suited for the tropics than Alaska, it even worked in Alaska. I lived in a small, little treehouse for two years and I loved it. All seasons, all kinds of conditions. It was beautiful, challenging and fun. The main challenges was the deep woods it was in and the sheer height above the ground.
Yet, a treehouse in the tropics can be as few as 7 feet above theground- enough to walk under, preferable more. This ground floor is a great place for laundry, kitchen and bathroom. There is also storage and places to hang stuff, dry clothes, etc.
Conventional housing in the tropics sucks. Stagnant, humid air, cockroaches, ants and mold. That is what you can expect even from a high-end home.
However, get the house up off the ground and that eliminates a good number of the above issues. Every ten feet or so above the ground is quite a bit dryer and with more air-flow especially in a place that has perpetual tradewinds like Hawaii. But most houses just have windows and two many corners. The fewer corners the better. They trap dust and energy.
There are SO MANY people trapped and lured, baited and hooked into buying a crappy, conventional stick-built house with very little natural ventilation and even then having so many part of the house that doesn’t ever see the light of day or fresh air. This stagnant energy transfers to the person.
The opposite is true living in a treehouse that has open-air capability and is also able to be battoned down in the event of a storm or heavy wind and rain.
The best design I know of to date is a hexagon floor plan with a large variety of ways to suspend that base floor 7-10 feet or more above ground.