Hey there midnight, and welcome back
Lesee if I understood you correctly. You mom is healthy enough to fly around the country, to get in fights with people, to demand money from relatives....
I dunno but it sounds to me like she is perfectly capable of taking care of herself when she wants to. Leukemia or not.
As sick in the head as your Mom may be, I think that the solution to your problem lies in getting _you_ unhooked from her. My first suggestion is meeting of al-anon. Have you gone to any of these yet? I have found them hugely helpful in dealing with my own emotions over my "toxic family"
I know how crazy making this kind of relationship can be, cuz I used to have a few. So have a big ((( hug ))) and keep on posting.
Mike