Reply To: Can Indesign do this automatically?

Raphael: The hardest part is to set up the Liquid Layout rules… the new Adjust Layout feature in CC 2019 can help a lot, though!

The key piece of information you need to figure out is: How much time (and therefore money) would you save. You cannot expect a complicated script like this for free, I think. If you have a budget of “three or four figures” then let us know, and scripters may be more willing to jump in. :-)