On which of these floor plans can we continue to build?

5m carport - do 2 cars fit under it? We have 6.15m - that is comfortable. But less? What I would understand, though, is the space requirement in the garage with 2 children. At least 4 bicycles are certainly necessary. The 12x8 still sounds much better to me than 10x9. It will never be a golf course in the back anyway.

5m carport - do 2 cars fit under it?

Of course that is tight. But a parking space in front of the supermarket or in front of the apartment building measures 2.25. And as I understood the OP, there is only one car or occasionally a visitor's car. In any case, the OP prefers the 9-meter garage to also be able to park in front of the garage. However, there would be no problem with a carport. And an emergency parking space would also be possible on the east side. In the middle of the house, on the east side, a storage room in prefabricated construction could be placed. 3 x 3 meters... And honestly: better 5 meters for 2 and a great floor plan and space on the west side than 3 meters for 1, compromises in the floor plan and no west side.

I wasn’t addressing you, your criticism is subtler and different in nature, if you read here long enough you can gauge that well and take some value from it

Nevertheless, the OP felt offended when I wrote in the green forum "If I were your developer, I would have long ago said, 'oh, just hesitate with someone else' (or have you committed)" — mind you: in post 178 (now edited — not by me), after criminals and Gerrit83 had made several concrete improvement suggestions, but the OP preferred to return to, I believe, the sixth edition of the original draft and wanted to know how many cm the hallway would still be wider than the door frames; and he also took my comment "I always say: real men drive women’s cars " the wrong way. In fact, my local car is an Agila and before that a Corsa and a Uno (well, I haven’t had a Micra or Mini yet). You can’t immediately recognize the Berlin attitude when it’s written down

The comparison:

I absolutely do not want to go through the entire initial post again. Does it say anywhere what the budget is?

No.
9 x 10 without frills and chimney. incl. finished garage. That’s all.