I'd like a dedicated brewing space as well. I brew in the garage year-round and it works well but I need to set up and break down for each brewing session.
You just need to stop thinking of your garage as a place to put your car!
I'm not the one that needs convincing on that point
We moved in to this house four years ago - there has never been a car in our two-car garage since. And there probably never will be unless SWMBO approves the funds for building a dedicated brewing space. You've got to set the expectations up front - she wants to park in the garage, this is what it's going to take