Tracy, cc does not always progress rapidly, but it is rare (~ 2000 new cases/yr in the US). BC of that, convenience must be pretty far down the list of criteria, since the best care is almost solely available at major cancer centers. Don't get me wrong, cc CAN progress very quickly, so time is not own friend here.
In my own case, I was treated in NYC at NY Presbyterian and operated on by their brilliant surgeon, Dr. Tomoaki Kato. BTW, NYP is about a 6.5 hour trip from home and I would do it again if needed. I now go there every six months for onc followups. In my mind, it's all about who you trust with this nasty disease.
Why is surgery not an option? My surgeon, Dr. Kato, has operated on successfully on a number of 'inoperable' patients. Certainly, there are some patients who are inoperable, but I would seek a second and maybe a third opinion from the very best you can find.
Good luck getting treatment for your mother.
Hospitals/Doctors Link, Our Experiences: http://www.cholangiocarcinoma.org/punbb/viewtopic.php?id=3126 See page 4 of thread for Dr. Tomoaki Kato info.
Major USA Cancer Centers: http://www.cholangiocarcinoma.org/majorcancercenters.htm