Your story feels similar to mine. I was on the Big 3 + several others and Amakacin. I too could not get a negative sputum and was told MAC was slow but, for me if started progressing. I tried to get to a Jewish but due to altitude was told no. I then started looking into transplant and my life changed. I am breathing and all equipment stored away or given away🙏🏼🙏🏼