Traffic is usually lighter at night. Depending on how the settlement is designed, the garden can be noisier in the evenings during the warmer seasons.
Four floors are planned. Why only occupy two?
It is repeatedly advised not to make compromises now for possibly later. A huge living and dining room is needed now. Also, a correspondingly large kitchen. For two people, that will be completely oversized later. Why not separate a part of it? Just a thought.
Kaho, you have shown some good floor plans that meet the needs. Small, delicate, not bulky does not work with this size. Regardless of whether the living space is distributed over two or three floors. With six people, building small really doesn't work.
Ultimately, the OP has to decide what his square peg in a round hole (wishes-money-zoning plan-need) looks like.
I am curious to see how the project continues.