Your son is very young and personally at this age I don't think it would be an issue - kids are very adaptable - later on in school life the chopping and changing might be harder for him to adjust to - but I would think till about 7 or 8 at least would be fine. I think the benefits would outweigh any negatives myself. Schooling might come into play at some point but that would be later. I agree with what you read, about you being the constant. We intend on spending a year overseas travelling round Europe in a couple of years, and if work situation allows it would also love to spend a couple of years working in Europe somewhere. I am from the UK, but have also lived in Spain, and travelled round Aus before moving here and I think is great experience. You are likely to be going back and forth between the same places right? So although contact is broken, 6 months here 6 months there - it isn't like starting in a totally new place every six months, and with the internet you can keep in contact really well these days. My kids don't see their UK family for years but they still have a good bond through using web cam etc etc.