With a nice clean space like that you can go a lot of different ways. I would start by looking at shower curtains, because they can become the focal point. When you find one or two (or more) that you like, you can play off of the colors in the curtain to find the color towels, bath mat, and even wall color. Some ideas: You could go classic black and white, with a touch of something bright if you want for an accent (like the fuscia in the photo) Or something "spa-like," in acqua and cream. Or you could go bright, with teal and lime green. Another classic look: tan walls, white and/or tan towels and bathmat, simple white accessories. Good luck!

Any rod will work that does not have decorative finials. A U shaped rod. I would prefer sheers and drapery that go to the floor. But you can use what you have also. A roman shade can take the place of the sheers and mounted inside the frame. You can use ring clips for the drapes for easy opening and closing. Thank you for the new photos.

Looks like the palm tree look is working so I would blend that with some succulents maybe agave which can grow large and make great statement plants. Also stick with the stones.

I'd take a totally different route . It looks like there is that narrowish window in the lounge or dining area -- I'd look at whether you could make that into a ranch-slider ( yes , I am in NZ too -- if you say ranch-slider it confuses the Aussies haha ) . You'd need a structural engineer to make sure that wall isn't load bearing , and also electrical cables are able to be moved , but I'd suspect the load bearing bits would be the corners , and you'd be able to 'open up' that wall onto the deck . While it initially may seem counter-intuitive , you could then take out the door and that other taller window -- close it in and add a couple of small windows , or how about doubling down , and seeing if you can 'open up' between what you call the 2 windows above the stove -- have 1 long flat window along there , OR even do another bay window -- that will add more light , but also by taking out the opening door , you will get an extra metre of space , That way , you can do a different kitchen design -- maybe a wall mount oven , or a pantry , a breakfast bar in a different spot -- basically , plan the kitchen and the window placement at the same time . The advantages would be more usable space , more light , an indoor/outdoor flow but through the other room , not the kitchen . But with more glass actually in the kitchen , it will feel lighter and airier , plumbing won't be as much of a hassle , it will look better . The only possible downside would be the wall you put the ranchslider in will need to be kept clear , as you may lose a bit of space there , but the breeze and openness will make up for that IMO .