I understand that there are no image limitations but I am planning on a extensive gallery of film. I could possibly be looking at 1500 albums with 10 to 500 images per album.

Is there any advice why this wouldn't work?

This product just keeps getting better and better. I love the fact that I can include film theme music and trailers, all in the same directory as the images. It's a one-size-fits-all package.

My only concern is in the two years previous and going forward adding more and more, if it will remain stable due to the size I am anticipating?

No, but of course it depends on your server's space and power and the size of these films used and how the actual site is setup.