Custom Content Types on Queue: Building an Order Notification System

I am currently working with a very old WordPress 4 site. This is an artist website that posts its commission queue, so that customers may see where their custom piece is within the ordering process. It was made as a simple custom content type. This website’s update to 5.x is long overdue, and one of the plugins that made that custom content type possible does not have a current release. It is no longer being maintained so essentially, I should leave this plugin behind for a WordPress 5 websie.

While I am in a position of needing to redo the custom content types, I would like to re-visit the idea of having custom content set up with additonal functions that allow notifications to go out upon update of content of this content type.

Visual of Premise/Idea

Here is a diagram of my Order Queue/Commissions Queue custom content type. I composed some screen snippets from the backend of CCTM (Custom Content Type Manager). Essentially I would recreate this custom content type in a fresh addition with a notification system of sorts. Essentially, the custom content type would get an edit (or a new order queue entry would be added) and when the person presses “update”, the notification system would listen for a change on the field “Order Status”. If there is such an update, than the notification system would issue an email out, related to the specific update to the “Order Status” field.

So far, I have checked out the following plugins, to see what I might find: Pods, Post Types Unlimited, and Custom Post Types UI. Would anyone if there is any “custom content type” plugin, along with a notification plugin that might work for my scenario?