Lots of good and thoughtful responses, thank you!
Here are some answers to questions:
~ there is no inheritance, except for the money from the sale of the house which will only be about $40K. Brother #2 and I have already agreed to hand that all over to Brother #1 because he will be taking her in at some point. He has an inlaw apartment and lives close to good hospitals/doctors.
~ None of this is covered by insurance or Medicaid at this point
I don't really consider being abandoned by one's spouse a "choice". I was in better financial condition before he left. This was unexpected, and I don't think that many people prepare themselves financially for abandonment.
I can't move there. She lives almost 3 hours from here. I'd have to uproot my children and leave all of our friends. And, maybe you haven't heard, but it's VERY difficult to find teaching jobs these days! She can't move here, because she would be alone all day, I don't have the room, and we are at least 45 minutes from doctors/hospitals where she goes often.