Compared to some of my systems, this is a very small number of table occurrences.
What you have seems quite close to Anchor Buoy. Relatively few changes would be needed to implement that method for organizing relaitonships--should you choose to do so. In a sense, each boxed set of table occurrences could be set up as a group with just a few additional TO's outside of the box included.
Please note that I really can't make a detailed study of your Relationships window as I can't read the text even when I attempt to zoom in to see the details.
Thank you for the kind reply. That sounds encouraging. The picture I posted was indeed of low resolution. I attached a version with better resolution. I would certainly appreciate some more input if possible. Thank you.
The relationship graphs from the multi file solution that I designed to run my business look like plates of spaghetti compared to your well organized graph, and that's after organizing it! Nothing to worry about. My solution runs fine.