Already have a garage. They were 'freak' events. We don't get rain in the summer, especially when the average daily is around 98* F and dry as a desert. The ash... I didn't even know there was a fire until days later. It traveled a great distance. Technically, you can blow ash off, but because of its nature, you're better off washing it after blowing it off with a neutralizing car soap.
Alas, our garage only has space for 2 vehicles and about 8 and 10 feet on either side for cabinets and whatnot. The second home we bought also has this problem, sans cabinets but we put those in later. 3-4+ garages are quite rare, even for larger homes/estates. A large home around 10K sq. ft or 930 sq. meters for you (I think I did this right), will only have a long driveway, possibly a canopy and then a 3 garage space, with a possible narrow entry for a motorcycle. Most American home design, both historically and new, have focused on maximum living room, bedroom and kitchen space. Bathroom, too, but a very large bathroom isn't economical if you only use it 1-2 hours a day in total. Hope that makes sense.
Also, because the city won't allow me to expand and I'm not in a position to build a second garage like some of my neighbors because I don't have a rear access road.
