This is similar to the Indonesian "thousand layer cake" or Spekok: https://en.wikipedia.org/wiki/Spekkoek I'm pretty sure there's a thread about this on eGullet somewhere. But your main question seems to be how to scale up, and by a huge margin. Hopefully someone will be able to help you with that. With the constant need to remove the trays from the oven to keep adding more and more batter, I'm not sure this cake is a good candidate for what you want to do.
Here is one link: https://forums.egullet.org/topic/100426-lapis-legit-spekuk-spekkoek/#comment-1528296 There are others.
