I have to completely agree. I too have a 4 car attached garage, but it isn't enough. It is 40 wide and 24/20 deep (two bays are 24 and two are 20). TwinV10 did a great thing and had his big enough to have plenty of space between his cars...I wish I had done the same. I could add some space by getting "concealed" lifts as I have an exercise room under the garage. That would kind of cool (having an exotic emerge out of the floor), but I don't really want to do that and lose my exercise room. Eventually, I will have to expand or add a detached...No.
Always go with as big as is reasonable. I have a 4 car attached garage and am working on outfitting a 40x60 outbuilding. I already have plans for a future addition on the building when the time comes.
I recently helped my uncle clear out a 60x100 building that was packed full of cars and other stuff. Still wasn't big enough.
You will fill up whatever you have.
BTW, you guys have some awesome (and clean) garages! :tup: