I think the OP should first close the attic topic, including the budget aspect, before commissioning new plans. Placing some of the equipment in the garage is, in my opinion, also rather a crazy idea. Which exactly and what do you hope to achieve with that? Should the room be integrated into the thermal envelope?
The topics of technology and attic were discussed in detail. Now we wait for a response from the architect, which may take some time.
Are the 9.50m ridge height limits in the architect's plan reached? Is there a section drawing for that?
No sections, sorry, maybe in the next version. Cost breakdown not yet available, so no idea what lies ahead for us.
Well, the hut isn't that huge after all. It remains a one-and-a-half-story building, and 12m total width isn't unrealistically large given today's wall thicknesses. Is it stated somewhere how many square meters it is in total according to DIN?