jobs come and go....family don't (or shouldn't).
i'm not expert, having only done it for 12 months after just getting married, but we didn't have any kids. now we have kids, I couldn't think of a worse case scenario.
no amount of money, even if it sets you up for a while or really helps with the education fees is worth it. bring the family, i think you'd be amazed how much they'd get out of it, with some of the best schools in the world and exposed to so many different cultures. jobs are jobs are jobs, you don't want your kids to define their childhood by the fact you were away for a significant part of it.
plus, quite rightly so, I would be annoyed if i was your wife - left with the day to day running of a family whislt you were in sunny singapore in a nice condo with a maid to take care of your living needs!
bring the family out on a test trip and then ask them all to make a decision.
good luck!