That is a great explanation of your history. I am impressed with the efforts you are making to stay healthy, and have just 2 comments.
My pulmonologist said it is bad to make your own solution for nebulizing unless you use pure pharmaceutical grade NaCl and have a way to test the concentration. Table salt, sea salt, etc can contain impurities or anti-caking agents that may irritate, and vary in their sodium content. It probably isn't noticeable at low concentrations, but could be a problem in higher doses.
You say your mucus is sticky, there are agent you can use to keep it thin in addition to the saline. They are called antimucolytics - guaifenesin is a common one in the US, but I believe there are others used in Europe & Asia as well. Taken daily, they reduce the "stickiness" of mucus, making it easier to expel. Another is a supplement called N-acetyl-cysteine. The f

Keep up what you are doing! Many of us have found alternative treatments instead of the harsh antibiotic regimen gives a better quality of life, but like you, I must be super vigilant to be sure the infection doesn't take over.
Sue