How could I get a Ford Fiesta?

So I have recently gotten my license and was handed an old family member's car who passed away. I like the car, but it is a yukon and gets awful mpg and makes it harder to drive. I am interested in the new 2011 Ford Fiesta that I saw you can get for about 14,000 dollars. How could I make enough money to get a Ford Fiesta if it is possible? Thanks!