I am "on a break" from saline nebs unless I detect an issue - for example, it is tree pollen allergy time, so I will begin nebbing 1-2 times a week as a protective measure.
My airway clearance is Breyna (generic Symbicort) inhaler, a glass of water, then my coffee, followed by one of these - 30 minutes yoga, a brisk walk followed by huff coughing, or pattern breathing with Aerobika. I don't even know what you would call my pattern, a combination of deep breaths, holds, coughs, Aerobika if needed, and if the mucus is stubborn some inverted poses. If I'm using saline, it's after coffee and before clearance.
So my airway clearance is integrated into my morning routine and takes about 10-20 minutes after yoga or walking. How far do I walk? 15 minutes to an hour depending on weather and time I have.
After that I have breakfast.

(Not shouting here, just emphasizing) I DO NOT TRY TO GET EVERY DROP OF MUCUS UP THROUGH AIRWAY CLEARANCE BECAUSE I WOULD NEVER BE DONE. I expel mucus throughout the day with huff coughs and spitting or swallowing just like I have done for most of my life.

I am not prescribing my method for anyone else, just telling what works for me. Everyone needs to find a method that works for them and can integrate into their life. It took 5 years of trying things to get here, and I know it may need to be adjusted if my BE gets worse or I get MAC again.

This is the only way I can possibly keep this up for going on 7 years now. When I have an episode, I do this twice a day, but it's very rare right now.