My eldest wants to be a psychologist and my youngest a vet, professions which could take them anywhere. My youngest is a triple citizen so the world is truly her oyster. As for feeling stranded, I know I won't feel like that as I have brought my children up to be resilient, confident individuals and they will feel comfortable and have no guilt doing what they please (or going where they please) when they are older. Close knit families struggle obviously, I have often read of mothers who say they won't be able to manage bringing up their kids without the support of their families. I am thankfully not one of those women.
With hindsight and we have lived in Canada, US and here with short stints in Norway and Holland, the hardest move I ever made was the move to London in our little Peugeot 205 diesel with 2 suitcases!! Moving overseas was a walk in the park after that!