Basically I just finished my first Amazon Review site, pretty easy competition and plan to have like 20 pages of content/reviews. I also plan to build as many sites as I can as long as I'm successful. So let's say I have 10 of these sites. If I were to start building my own blog network for my own use... how many blogs would I need to rank those roughly? Could just the blogs do it or would I still need to use other types of links?