I might not be the most knowledgeable when it comes to SEO but I've had a client today ask me to take a look at his site. I've had a quick look and there is tonnes wrong with it and it would take around 2 hours to write everything up that he should do about it. What should I charge - I know that's a little vague? He's pestering me for a price and I just don't know. I know some companies give it away for free but he's adamant to fix the errors himself.