ASK/LF YC: Paying for Code Reviews?

So I've gotten approval to work on some code outside of work, and I'm looking at getting back into writing some scheme code. That being said its been pretty long since I've written scheme code, and I'd like to improve my style. Does anyone have experience with hiring people for code reviews? Where do you find them? How much do they cost? How do you judge a good code reviewer? etc.