I probably would steer away from black if you want to keep the country theme

We used Bunnings flat pack shelving in one of our walk in wardrobes, I'm pretty sure it is Melamine and it is fine. There have been a lot of advances and improvements to these products over the years and they aren't the cheap nasties they used to be. Ours are a matte finish too so look much nicer and classier than a gloss. Have you asked the joiner for a sample of just what he is thinking? This should give you a good idea. Check out Bunnings flat pack products too. You could use just an MDF and paint it, but that is more work and the paint can chip or wear off on shelves. Unless you want to go to the expense of having all solid timber, you will find most products are MDF coated with a timber veneer or a product like Melamine. Going on what I have, and I know Melamine was used internally in my new kitchen cupboards, I don't think you will have any problems. If you are having shelving, do ensure you use adjustable shelving too - it is such a bonus in areas like this when your needs can change over the years and it is so easy to just add or subtract shelves or adjust the height. The wire systems are OK for some things but over the years the plastic coating cracks and breaks off and you could then have difficulty replacing the baskets. You are also more restricted with sizes.

siriuskey, Yes, the courtyard is open to the sky (no roof over it), I assume this is what you mean by double story. Ref. below photos, I would love to get this look, especially the first and last photo, where you can see family living space from the first floor. I can't achieve this in my plan as it eats a lot of floor space upstairs. The referred plan (photos) has a very big void combining staircase, hallway and dining area. I know it is not easy with cooling and heating when you have such a big void. So, I explored a few ideas (with my limited knowledge on this topic) before achieving the current floorplan. I have also thought about, in my current plan, extending the void on the staircase to the dining area (it is more like L shape) but i wasn't sure if that makes any difference. keen to hear your thoughts.

We have recently done a shaker style kitchen makeover for a client, it‘s in the album „Kitchen Renovations“ and from what i understand they are mostly solid wood for the cabinets.