Which property would you choose?

*thumbs up* :)

Based on such flat sketches, I find an evaluation quite difficult to impossible. Other factors should also be taken into account.

Which factors do you mean? I have tried again now, just rotated it. Even if the development plan looks different. Does this help you further?

.. when the farmer spreads slurry, it can be smelled far downwind ... it doesn't matter whether you sit right next to it or 100m away. In the morning the air rises, so it smells just as strong up on the slope.

However, modern farmers no longer spray the slurry onto the fields through the air, but inject it directly into the soil with hoses - this is much less odorous than in the past

Factors such as infrastructure, etc.
Based on the previous data, I find the left property (field) more pleasant in terms of the sun’s path.

...
Whereas modern farmers no longer spray slurry onto the fields through the air, but apply it directly into the soil with hoses – this is far less odorous than in the past

This is how it is done with us.

I would choose B, a good view is great, hillside location as well. Factor in additional construction costs. Level the plot as little as possible and design a garden in harmony with the terrain instead of working against it, that makes it much more beautiful and also costs less. Every now and then some fresh country air bothers me less than a lot of biting insects from the water.

Thank you for your opinion and view.

That was not an opinion, those are simply facts

I exactly traced the development plan on the second draft, so I don't quite understand the line of thought.

No. But now you have it [ATTACH alt="Bildschirmfoto 2021-03-10 um 10.14.28.png" type="full"]58605[/ATTACH] Now you can compare the orientations. However, it would also be nice to know how to even get to plot A? And for assessment, the plot widths, the scale, and the legend of the development plan would still be important. That is not an opinion ;) If you don't want to, go to Sonnenstand or Sonnenverlauf de and simulate it yourself. But even there, the development and the scale are queried.

Clear statement variant B. How is it developed?

What do you understand by a slight slope? Provide some values. 2 m over the plot length?

You also have the stench with A.

Do you also have a connection to the owner for building in B? Developer?