I started a website around a month ago with original quality content and I am starting to build web 2.0s to link to my website to build up the authority of my keywords on my main site. I have build 10 web 2.0s at this point and they all have atleast one quality article on each pointing to my money site. Should I start building backlinks in bulk and send them to my web 2.0s so the links will have more authority? I know there are things like wiki links and stuff like that, but I am stuck on how to build bulk backlinks to these web 2.0s. I don't have the money for software at this point so everything will be manually done. Any advice on how to take my next SEO steps?