I’ve been through this process myself in WA, about 1km from the coast. I found that the house design and the characteristics of specific location, should be your main concern.
In my case being close to the coast meant that in the summer season, there was a predictable cooling sea-breeze most afternoons, but without internal and external temp sensors it was all to easy to think that the windy exterior was cooler than indoors, ie, thus opening the windows too soon to cool the interior, likewise the roof vents. So good sensors and possible some automated window opening devices might be worthwhile.
also in my location, the fridge was the heaviest user of power, ie, over a year more than heating and cooling, you too will need considerably less of the latter than conventional homes.
My experience was that cooling my home was easier than keeping it warm in the cooler months. So, I would recommend increasing exposure to the spring and autumn sun, ie, reducing the depth of your roof overhang; increasing the window openings breadth, ie, the return for curtains is seldom as large as architects imagine. Lined curtains with pelmets, roman blinds with 100mm+ wider than the frame are also good maybe with added velcro patches to hold them in place.
Double glazing makes sense, but using the glass type that permits solar entry, some types do the opposite!
Room positioning is critical you really need to put living spaces on the north and sleeping on the south and east, ie, morning sun in a bedroom is lovely, and not overly hot. Bedrooms and offices typically need desks, beds, chest of drawers, filing cabinets, so are also probably better on the south, with windowsills 800mm+ above ground. Dark tiling on concrete mass really makes for a wonderful source of draft free heating, warm feet and a cool head - heavenly!
Some years ago I asked Choice what they would recommend for kitchen appliances, Induction worktop, Convection Microwave and a non electric pressure cooker, no oven, no dishwasher.
Why do you want a swimming pool? Are you a keen swimmer, ie, all year round for exercise, then a tiny one with a pump for a current to swim against. Could be a heat sink, ie, thermal mass.
I mention these designs, because, what you need in appliances depends on how your house performs, what you need in your lifestyle and your location. How much heating are you going to get from the sun, and how much cooling from a suitable breeze, could mean no need for air-con or additional heating, ie, none at all! Hence how significant is power production? Do you eat out, or all meals at home and lots of entertaining - cooking is essential, etc.
I think downlights are a bad idea that should never have been allowed.