My oldest, more than likely. My daughter, no, not likely. We have to think of the youngest now. It's a stressful decision, but which one is worse off here is our main thought process. Youngest has zero family here, no family gatherings, at all. He has just us, and that's it. WE also need more than this for our lives. My family is not to be counted on, but Liam's family is so huge and loving, cousins same age as youngin, etc. My daughter has a pretty good quality of life.. I cannot stand that stepmother gets to go thru life's motions with her, but it's purely a selfish decision on my behalf to force her to uproot clear across the world. We will be figuring things out with my ex in a face to face convo sometime soon. It's still always, ultimately my daughter's decision as to where she lives, but, she is a little girl @ 11 yrs old, and not yet equipped to understand what life may have out there for her in regards to adventures and opportunities. Her life right now is about friends, cheerleading, gymnastics, what to wear, and boys.
Have you asked your daughter if she'd be interested in Australia? Even at 11 my response would have been "Hell fucking yes!" (And then I would have been grounded for the entire time I lived there.)