Sorry to hear of your family's sadness.
This notorious passage can be a real heartbreaker. I think Barrios must have had a smaller guitar than we have today!
What helps me get that low note is to bring my left elbow in as close to my body as possible. I have to keep my index finger as straight as I can, as if I were pointing at the headstock. It works about 7 out of 10 times...
Hope that helps a little!