I know you can schedule per source, but is there a way to do a Master Schedule (it controls/publishes to all sources)? I would like to setup my cameras to motion detect based on when I am not home but I would rather not do it source by source.
That’s a great idea. 
That is not available in NCS. Use windows task scheduler to exit/start NCS or just make at bat file where you with a click just start/exit NCS.