Let me summarize what I think I have understood (sorry, I have the impression that there must be something in the drinking water, somehow the week of confusing threads has broken out here): 1. It is about a house with two residential units, which is to be purchased together with a friendly family; 2. The house could be divided into two ownership units, approx. 40% would be the ground floor, approx. 60% the upper floor + attic; 3. To be purchased along with it is a large plot made up of several parcels of land [question about this: on which of these is the house or its setback areas located?]; 4. The house is variably ready to move in: the "ground floor" residential unit is not yet, the "upper floor + attic" residential unit is conditionally available immediately; 5. You know the other family as neighbors from the same rental building; however, this is not the one planned to be purchased together; so we are not talking about a landlord buy-out; 6. Neither of the two families is good enough for their bank [question: are these different house banks?] for the total amount, therefore you want to buy together with the other family; 7. For this purpose you would like to split the building into ownership units, but you want to treat the common ownership of the entire plot in a different value relationship than the areas of the residential units would "suggest"; 8. Selling off unused plot areas would not solve the problem because these would hardly be attractive to buyers.
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On the sidelines, a heartfelt plea "@ all": I wish the next week would be "normal" again, and here no more half-stammered story fragments but again complete thoughts are told, whose understanding no longer requires the combined deductive abilities of Holmes, Watson and the three question marks (I hereby admit to being the only one of my school year who has not read TKKG). I’m slowly reaching the age where mind reading becomes exhausting.