You have the SEO expertise? why do not you just sell your skills are? SEO service business is a business with the potential income that can be said to be great. Promotion is a fundamental requirement in the Internet business, and SEO itself is a campaign that has no doubt its value.
Make sure you are an expert in the field of SEO, because when you've trusted to optimize people's websites but you can not do your job, then it could damage the image of you or is tantamount to suicide because of beliefs that have given your waste.