Scene management and organization is name of the game 🙂
As far as I can see, you are still on older version of C4D? Having the latest version would greatly help due to having access to functionality such as rerouters and floating I/O nodes. The other thing is, it is possible that your modular wall can be reduced in complexity depending on how it is designed given the version you are on. Nodes came long way from that point, some concepts you are using may even be obsolete.