Hi! jleo3
First of all. Please allow me to offer my sincerest condolences on the loss of your Grandmother.
From your description of her, she sounds like a person I would have liked to have met. I would have been honored to have made her acquaintance.
I know she is proud of you for taking up on her project.
You have every right to be concerned 'bout the cold weather in your area. The Avocado is not happy if it is taken out of it's natural plant zone, and I'm not talking 1, 2, or 11.
The Avocado, doesn't like any Latitudes + or - higher than 25° not withstanding Elevation.
So what you need to do is simulate those tropical conditions for 9 or 10 months out of the year.
Since you've done tons of research, I hope you haven't seen these yet:
Avocado General Information
Avocado Information Home Page
I'm trying to find the 'mark I have from New Zealand fruit growers assoc. a PDF that discusses problems of increasing their annual tonnage. It explains the three basics for increased production
Carbohydrates, oxygen intake, and ........eddie what's that third one? Did you find that 'mark yet?.......eddie's my assistant
If you have or haven't seen those let me know, and we'll develop a plan of attack.
K