Perhaps one of the other Bronchiectasis & NTM Care Centers would be more accessible to your Mom, and without the complications high altitude and air travel.
Here is the current list:
https://www.copdfoundation.org/About-Us/Press-Room/Press-Releases/Article/2166/Thirty-three-centers-join-new-Bronchiectasis-and-NTM-Care-Center-Network.aspx