When we first bought our house we looked at the garage, measured it and found it great for our needs. It could hold 4 cars perfectly, 2 side by side and 2 cars deep.
After I moved my tools in and built work benches cabinets and started adding more goodies in we got to where it would hold only 3 cars.
Then guess what? I found this site and started reading the tool forums and now 2 cars live inside, 1 is left outside and the 4th is at my mothers house ready to be dismantled
I know what you're going through