It does get harder to drive all the cars and take care of all the cars, when you have more of them. I mean, even if your just taking them to your mechanic it takes time.
As to your friendship with Carey, sometimes when you get into a hobby and find a craftsman that you like, you develop a work/ friendship that can grow into a lot of fun. Glad you guys are enjoying the ride personally as well as car-oling or should I say Carbuilding