If you are going to use a freelancing site like rentacoder.com you'll finish working $10/hour until you get good feedback. But I'm not sure if you got good feedback your rate will raise. The median is $20/hour for all freelancers in Odesk.com (which is much more better than rentacoder.com)

A solution that work: build something and make it open source and free.

For example build a Wordpress template (a premuim one) add SUPER functionnalities, good silk design...

People who will love your design, will hire you. You'll get a lot of requests, then choose the best.