Floor plan design single-family house Bavaria - Procedure planning and construction - Advice

Which vehicles actually need a garage within the thermal envelope of the house?

Valuable, old vehicles like to be kept well climate-controlled. Those who want to keep them at home put them in a climate-controlled garage. Those who just pick them up to drive park them at a service provider.
Current everyday vehicles don’t need a garage; they also stand outside without any problems.

And with all due respect, oldtimers or youngtimers are rather not to be expected with the budget for the house.

I don’t expect anything at first, because the world is colorful and enthusiasts quickly exceed the imagination of others when it comes to hobbies, and whether someone has saved up or inherited something you also can’t see. The OP can clarify that.