As far as two cards goes, most people with good credit scores are able to get two Chase cards within a short amount of time. If you are denied, there is a reconsideration phone line to call to ask to get your credit limit moved from one cc to another.

I think the general rule of thumb for Citi is one new (different) card every 60 days.

Be sure to get your fiance and any stateside family members with good credit involved too if you can.