If your plan is to eventually work for one of the big carriers in the US, why not do it now? Coming here will certainly increase your bank balance as a single guy but if you were to do 5 years in 'exotic' Dubai, you'll be returning to the States and starting at the bottom. You'll be 34 then. That's 5 wasted years in my opinion and long term, you'd be financially worse off. As for lifestyle, please read the thread 'INSANITY' started by Pixy. He hits the nail firmly on the head regarding fatigue issues and days off. The 330 is not a nice fleet to be on and you have no guarantee of what you'll get when you join. The Company may well promise you a B777 or 380 but it can, and has, changed on the day you arrive after signing on the dotted line.
I would be the first to advocate you joining EK if I thought it would be in your best interest but in your case, I can't.
Harry