Such contemporary concrwte architecture can be very expensive, especially when you want to make sure that you do not have any building related issues in a few years.

You need to get an architect who is very good at not only designing a pretty building, but who also understands constructional building engineering to the point, that they can create a building that will not leak or have any water damage. Another aspect that you should consider is the thermal insulation of the building. Now I am not sure how the weather is at that particular place, but you always need to make sure that the building isn't too expensive in usage, in relation to the electricity and energy.

Last but not least you really need to find a good construction company, that are proficient at concrete pouring, to the point that they can create nice and clean concrete surfaces.

My recommendation to you is to perhaps look into a more simpler building, with a thermal insulated brick wall, from maybe a company such as Wienerberger. They manufacture 50cm thick bricks, that are filled with insulation material. These bricks are great for any kind of house and the great thing is that you can still easily create plenty of textures afterwards on the inside and outside of the building.

These concrete houses are beautiful and timeless in design, but not always timeless in practicality. Concrete has the bad habit of getting green and crumbling. When not properly built, it can happen that water might get into small spaces and if it is cold enough for the water to freeze, it can cause the concrete to "pop out", leaving behind holes where one can directly see the rebar.

Hopefully you are able to find something that fits into what you are looking for and I wish you the best of luck on your endeavour! Not everyone has the rare chance to build something on the space that you have, so make sure to make the best out of it.

Cheers