Why does everyone think that the OP wants to save money? My impression is that is not the case – at least I wouldn't recognize that as a primary goal.
I don’t see it either. This is a big cube-shaped house, and I think the space fits accordingly. I have one more thing to complain about: in the kitchen, there is only space for two tall cabinets. That’s not acceptable to me. There has to be more space. Although there is cabinet space on the opposite wall, it’s not deep enough to fit a refrigerator, oven, dishwasher, and similar appliances. I would plan for at least three tall cabinets side by side – especially since there won’t be any upper cabinets (for spices and such) within easy reach. I also find the wardrobe cabinets insufficient. Without measurements, I estimate about 3 meters of walking space. With these house dimensions, I would expect at least a large shoe area and a bag chamber. Actually, more like a cloakroom, since children are planned as well. And I expect a utility room and laundry area in the sleeping area.
I like the openness, as I already said above, but for living in it would be too large... too open... uncomfortable. There is a wall or ceiling opening everywhere. The staircase will probably have open steps, just like the open shelves above the dining counter. The fireplace has three sides with glass, and the sliding doors are made of glass. Was the stair safety also made of glass? Yes... You don’t feel protected or cozy in the house; I would consider that as a builder. There probably won’t be any visual resting points, and everything is somehow immediately visible. There is nowhere a cozy corner or a certain tension of “what might be coming next.” The only exception is the sofa position, but with 33 sqm and the wide opening to the dining and terrace area, that’s rather cool too. Hmm, I conclude for myself that at this price and size level I expect even more than large windows and lots of space.
Edit: I just noticed the children’s rooms [emoji15], they don’t have a real protective wall at all... that really is too many windows...