Should I take Big 3 + inhaled ARIKAYCE

I am currently 48 year old, I have NTM- MAC with a couple of cavities (1.3 cm * 2.2cm , and 0.5cm* 0.5cm), the big one increased in size from last year ( it was 1.9cm * 1.2cm) and this small one (0.5cm* 0.5cm) is new. Also I have nodules in both lungs widespread. I am using Saline 7% but I don't know whether it helps with cavity. Also my sputum test turned from negative to positive this year. My doctor is concerned that the cavity will keep increasing in size and quantity so he wants me to start antibiotics as soon as possible. He is a great doctor.

I am deeply concerned about the side effects of big 3 + inhaled Arikayce, that my doctor is going to prescribe for me.

Do you think these antibiotics will help with MAC? I truly doubt about it. I did a lot of research, MCA is too hard to cure and it may come back. Not to mention the side effects... I also studies Sue's cases and she is doing really great with Saline 7% without extra antibiotics.

My doctor ( NY) also says they are going to study phage therapy next year. ( I shared my story about phage in Belgium in this forum ) But he says that any new type of antibiotics is not in the pipeline yet. So I am thinking maybe I should take antibiotics. He thinks maybe I can tolerate the medication because of my relatively young age. I don't have other diseases so far.

Do you have any suggestion for me? I am thinking of just closely monitoring with CT every three months. Really struggle with my decision.