Thanks to all the posters for your responses! After looking at some international job postings online, I myself also feel that it would probably be better to work a little longer here in the US and build a decent nestegg.
[I think I may have been influenced by the book "Nickle and Dimed..." and thought I should put myself through some kind of international low-wage job experiment.
Maybe a more active approach is to find a job here in the US that's more exciting for me, so I don't daydream about ER everyday. In my current mental state, even 5 more years at my j*b seems too long.
Anyway, thanks again for all your insights and concerns. It has been really helpful.