How much you guys spend on SEO per month? I am trying improve my site page rank 2 to page rank 4. I not sure how much I need spend per month roughly, domain is about 1 year old. My previous domain is 5 years old, I just migrate to this domain and google know about it. MY question is how long to actually rank up to page rank 4 from page rank 2 with how much spending should I make?