Purchase decision small semi-detached house 100 sqm from 1930

So our energy consultant wrote the following to me regarding the same question:

We have 2 residential units, hence the 2x. If BAFA and KfW were separate pots, we could have applied 240,000€.

Per year? Can I exhaust these pots in different years? So eligible expenses: 60,000 € individual measures in 2022 and 60,000 € again in 2023, as an example?

Yes exactly. However, I wouldn't be so optimistic that you can still take advantage of this this year (you haven't even bought the house yet). Possibly 2023 and 2024 :)

Yes, exactly. However, I wouldn’t be so optimistic that you can still take advantage of that this year (you haven’t even bought the house yet). Maybe 2023 and 2024 :)

Should only serve as an example :-)

I have just received the floor plans - they had to be dug out of the archive at the building authority first. I will upload them here soon. Preliminary question: The outer masonry on the ground floor and attic is double-layered, 30 cm thick. Energetically probably to be rated as a complete failure, right?

Cavity between the walls approx. 6 cm, in theory it should be possible to fill this with blown-in insulation, or am I wrong?

Here are the floor plans.
Note here: The dormer on one side exists exactly the same on the other side (presumably built later?) and the knee wall on the upper floor is significantly lower, so the living space on the upper floor is considerably larger than shown on the floor plans. I come to about 57 sqm on the ground floor and about 50 sqm on the upper floor. The attic could add about 15 sqm, I estimate, so we would have roughly calculated 107 sqm without and 120 sqm with the attic in total.

I'm amazed at how precise and clean the documents are - I wouldn’t have thought that possible in the 1920s or that everything was planned and recorded so precisely back then. According to the building authority, we were lucky - it is apparently not really common for that year of construction that documents still exist. But yes, you really have to make an effort to see everything clearly ;)