@farfalina I am a BIG fan of conservative, nonsurgical treatment first - especially when it involves my vital organs like lungs and heart.
Are you seeing a pulmonologist with experience treating MAC and Bronchiectasis patients? Since both are rare diseases, not all pulmonologists or ID docs see these very much in their general practice. I would personally make sure I am getting treatment from one specializes who is BEFORE considering the surgical option.
Here is a list of many centers where they specialize. Maybe one is near you?
https://connect.mayoclinic.org/discussion/the-bronchiectasis-care-center-network-33-centers/