Monthly Layouts combining with Static Designs

I'm currently managing a document with 13 master page layouts:

• 12 tailored for each month.
• 1 for a non-specific month.

Additionally, I have static designs for daily, weekly, and monthly views. Here are the issues I'm facing:

1. Reducing Master Page Count and document weight: I'm trying to avoid creating 12 variations for each of the 3 types (daily, weekly, monthly), which would result in 36+ master pages.

2. Efficient Design Updates: I need a way to update one static layout and have those changes automatically reflected across all similar layouts.

3. Layer Management: I considered using layers within each monthly layout to switch between daily, weekly, and monthly views. However, toggling a layer on or off affects the whole document, not only the page I am working on.

I'm looking for advice or techniques to manage this efficiently. Are there InDesign features like nested master pages, conditional text, or perhaps scripting solutions that could help? Or any other method to control visibility of layout elements without affecting all instances?

Any insights or alternative approaches would be immensely helpful.

Thank you!