How much should SEO cost for a good content website?

[navjeet]

I have a content website, and the content is very good. I have been doing SEO on my site for four months. I have had a one-way backline request success rate of almost 20%, and reciprocal link request success rate of almost 65%, which I think is very good.
However, I want to spend the little time I get off my university on improving my site, rather than SEO. If I hire someone, or web site Design Company to do SEO on my site, how much should I pay? Will ad Sense or something similar be able to cover the costs?

Thanks

[temi]

What you pay for SEO will depend on how competitive the market segment your site is. You should contact a few SEO company and ask for a quote.