Non-warrantable condo financing

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I work for the US government overseas, and I want to buy a condo in Atlanta. The plan would be to rent it out for the next few years while I'm over here and then move right in when I return stateside.

I've been able to amass around $12K for a down payment and closing costs. Problem is that's a little short for the $90K condo I covet; since I'm not moving directly into the place, at least 15 percent down is required. Can qualify on credit score and income, it's the liquid assets that have proven problematic - along with the recently-learned fact that the building I want to buy into is non-warrantable. 

Hoping the knowledgeable members on these forums might have a solution in terms of creative financing. I want to buy soon, it's a rising area and I want to get in before prices balloon. After that I'd like to continue to buy investment properties, but this particular purchase is very important to me and my family for personal reasons and is therefore a priority.

Thanks all for taking the time.