Animations and Masks across Multiple Projector Outputs?

Let me start by saying I am really new to AE, and probably know just enough to be dangerous. I have followed many tutorials to build a projection map on to my house. The process....

I sat outside with my laptop connected to the projector where it is permanantly mounted and then drew all of the elements on my house (shutters, windows, columns, etc.) Then in After effects I animate whatever I want across that whole view since it is a sincle projector.

You can get an idea of the results here:
https://www.youtube.com/watch?v=NXTqkQejFQw&list=PLGnWjg0ynQrXEoRhiZ4yTHPdYVYkZwLoN&index=9

You can see in some cases it is not as bright/crisp as I'd like. Some of that is light pollution from the other lights, but much of it is how far away I have to be to use a single projector. My initial plan was over time bigger/better projector, but I've been experimenting with some of the lower cost smaller projectors and for some parts of the house I think they would do quite nice. The problem.....I have no idea how to make that work in AE so that I end up with a move file per projector and could somehow still animate across all of them? 

This might be a better example of something across the entire house:
https://www.youtube.com/watch?v=iF2K0BU1s8M&list=PLGnWjg0ynQrVh9tUrlnA2DLxQjbcxENwk

If someone could point me in the right directions I would really appreciate it.

Thanks,

Dan