Sorry, don't get me wrong, but please stay on topic. Still, thank you for your opinion and your effort.
The "effort" is not an end in itself, but is supposed to be useful. I always stay
on topic, only if I also stayed
with the question (in the sense of sticking to the limits of expertise at the edge of their formulation), it would border on failure to provide assistance (and you don't do voluntary service in an emergency room for that).
We would have liked to have it in the wall as well, but since this (ground floor) is load-bearing, the architect also told us that it cannot be done.
That is only roughly true or simplified; and in this sense, a ridge beam is also a "load-bearing wall."
So, first: what does the property have to do with my question and the basement? And second: what does my forum name have to do with the architect’s planning?
If someone calls themselves a “do-it-yourself planner” software (and the design result may come in the appearance of professional planning but structurally breathes the nature of an amateur plan), then my conclusion is simply obvious. The property has less to do with the chimney position question (neighbor distances for the chimney were already pointed out), but very much to do with the economic side of the decision “for or against a basement.” So if suddenly a basement is revealed as planned, this follow-up question comes straight as “Amen” in church.