I never really had them all at the same time....they came and went. Some saw use...others barely any...one or two none at all.
I'm very well behaved now...only 3 hicapas and 2 AEGs. Only the essentials. I never keep anything I don't use for over 30 days....bolt action, pistol, SAW, rifle, smg, grenades, whatever....if it's not being used I don't have space for it and out it goes. No collecting.
I keep a mental tally because of all the repairs coming and going...in constant need the oddest parts. Gun docs are great to know...they've always got something on its way out...or are looking for something else immediately.