Capt Kaboom - I'll leave a link here but move your thread to the Far East forum as that is where the SIA and Silk Air guys post and they have an up to date measure of the current cost of living in Singapore.
For what it is worth, I left there nearly three years ago and US$3000pm is about what most of us paid in rent alone! (They may have come down a bit since then). Personally I think you would find life very hard on that kind of money, what other allowances do you get?
regards,
BlueEagle.