Hi Philippa, how i feel your pain....my son and wife and 3 grandchildren have just been here for xmas. First time i have met the younger 2 children, and saw the older girl when she was a new born, and we visited them in Australia.
They stayed for 3 weeks, and it was very bitter-sweet. I adore my son, but i am lucky because I also have another son and daughter who live locally. But it has been over a month now since they went back, and I am in the deepest depression now, as it churned up everything I experienced the first time he left here for Australia. The three children are extremely hard work, I could see stress in all their relationships, and what makes it doubly hard is that they are not particularly close the her mom or sister. But when they were here, all the cousins bonded so firmly and happily.
So i don't feel they have an idyllic life at all, and if they were here, we could support them so much.
But i respect their wishes, and have accepted that their life is so very different to anything they would have here, be it a good thing or a bad thing.
Sorry to be negative Philippa, and I am sure, for you, it will be very different. Just concentrate on saving to go and see them, but be prepared for heartache and sorrow along with the joy. Good luck to you and your family