This is exactly my theme - I had the same idea in January 2019 (before I became a member of the mAirList team) in the german section of the forum.
Torben was not so convinced:
(“I recommend trying virtual folders for this use case.”)
Briefly: He was right.
Please try working with virtual folders instead using hour restrictions. On the long run, it makes it easier for you - and the Mini Scheduler. 