You can make it easy many different ways.
Make many models out of the same window edges.
All verticals could be one model. All horizontals could be another model.
Each 4 sides of a window one model and all windows together another model.
Odds/evens another 2 models.
This will allow for MANY more possibilities. It's already there, it's just how you apply the creative process.
I just created 3 windows and made a whole house model of all 3 Windows. Many effects look great on all windows as single model.
Butterfly, Spirals, Bars, Curtain, Single strand.