Floor plan of the residential part of the farmhouse CH - room layout / usage area

It is always more effective to simply continue discussions that have been started even after a break.

That would then be here:

and I can fully agree with that (but unfortunately also with the assessment that this is a plan with, if at all, a confusing concept). It is not comprehensible where the (alleged?) foundations or constraints originate from. Apparently there are specifications here, but they do not become apparent in the discussion. And it is rather confusing to additionally show the exact location of the bathtub in the building to be demolished with a yellow dashed line.