PTC? phenylthiocarbamide? Just kidding. I know it's Peachtree City.
Rodney is right about the employment and credit requirements. Having a score is not the only focus of financing. If you worked for a US company and filed US returns, you should be okay. For FHA, you'll need to have at least 3 lines of credit that have been active within the last 12 months.
FHA (Federal Housing Authority) also allows you to participate in programs like Georgia Dream Foundation. Just be aware that it is income based and if you make too much, you won't qualify. Same goes for USDA. FHA is capped (per county) on how much they will lend and the mortgage insurance premium is redunkulous (not misspelled).
With good credit, a private lender will buy a house for you and give you the time to correct your financial situation so that you can buy it later. Rate is usually higher (starts around 8.5% interest only), fees are higher than normal. This is a person lending you money, not a bank. With 5-10% down, you can qualify for financing for yourself. Foreign Nationals require 40% down.