it is a standard 2 car garage. I have 8 actors or so and 20+ years worth of props. I have many pneumatic props as well: Axworthy, FCG, Spill your guts illusion, tons of lifter type props and if I don't have it I can make it
Rooms aren't huge and it's just a guess but 10'x10' ish...
I hate chain saws so we never use them. I have props for cemetery, industrial, torture, medical type of themes. Again I just mix them all to get a good flow/theme