I created a few sites and am building manually backlinks from nieche relevant blog comments for the first month. After the 1st month I want to use some bigger guns to target my main KWs and get them ranked. The trend seems to be to rank through (high) PR private blog posts. The problem is, that my budget for link building is limited right now to about 500$. So would rather buy some PR2 and PR3 expired sites with a good backlink profile or would you use some backlink services in the beginning until I have a few k and then invest in a private blog network? My fear of building it right now is that I invest all my budget in buying sites, but the link juice wont be strong enough to get my sites to the top3, since with this budget I can mostly afford some good PR2 and PR3, plus maybe a few PR4s. Also, I have only 6 sites right now. I think an own network makes more sense if you have 20+ sites, especially if your budget is limited. THerefore, I tend now to use some services like a pyramid from Sherlock hacks or private blog posts from seoguy99 or Zso, since these guys have amazing reviews and their link juice will be much stronger than from my own network. What do you think?