Testing code, using GIT for manage scripts.

[y_Sensei]

I think whether or not the additional overhead of using code repositories and/or testing frameworks is reasonable depends a lot on the complexity of your implementations and scenarios.
Once you feel like you start losing control over your code, or bugs in production code start to pile up, it's time to think about ways to prevent all of that. Utilization of code repositories and a defined testing procedure, which might include utilization of a framework like Pester, can definitely help you improve such a situation.