Unfortunately, I don't/can't drive them all enough (see post #12) I do drive them a lot, but there just isn't enough time in a week to drive them all. I do spend a lot of time on ALL of them keeping them drivable, though.
I enjoy working on cars when I don't HAVE to work on cars. If I HAD to work on them, I wouldn't enjoy it. Sometimes, I only have 1 928 drivable, but I always keep at least 1 drivable so I can enjoy all of them. When I have all of them drivable: WHOOOO HOOOO!