To rank your page on the first page of google against a particular keyword is bit tricky. Without on-page SEO, this is impossible to achieve and you will miss your audience to hop on your page. The more unique visitors you get, the more money you earn from your ad networks. More unique visitors also boost your page ranking and this is cumulative. So Hey! What are you thinking. I am doing this for years for my clients. Spend only $5 a page and see the result.