We moved here in May 2008. It was my idea and I had talked about it since I was about 15! I was 38 when we got here. My dad was in bad health, but the wife, two teenage boys and I had his full blessing to come over here. His biggest regret was that he didn't when he had chance. In September 2008 he died.
We had just got our lives here sorted. Jobs, rental, schools etc. We had a little bit of money left in the bank, enough for 1 flight back. The wife insisted I go, but I couldn't. All I could hear in my head was his voice saying, "don't be so bloody stupid. Waste of money to watch a box go in the ground. You have your family to look after now."
I understand for everyone it is different, but the way I have always seen it is, that our parents have had their time and did what they needed to do for us, but there comes a time when we need to do whats best for us and our children and not live in our parents pockets. My dad was a great believer in that and that has help me with all the traumer of moving etc.
All the best, take care and do what is right for you and your family.
Good luck