I will not amswer every question imdividually as i fear that will not really help. I made a web 2.0 guide you should look into. I can shed some light for you. Two opinions exist on web 2.0s. One is to target your main key word. Not dumbed down, but cover your main keyword. If my keyword is blue widgets, the web 2.0 would be about blue widgets. I do something different. I target a long tail keyword. My articles target multiple keywords including long tail key words. I also find a list of long tail key words which are related but will not fit into my money site. For example, blue widget money site covers terms: blue widgets, blue widget home repair, home widget set up, blue widget installation. Another long tail varient i found in keyword research is "blue widget installation cost". Since i am not using that keyword on my moneu site, i write an article about it and use it on my pbn or web 2.0. The long tail keyword should rank if it is low comp and a long tail. Then i link back to my moneysite. The reason i do this is i find a link from a website ranking in the niche is superior to a link which is not ranking for a related keyword. The other part of your question is how to link. That is a whole other can of worms. You need anchor text diversity but you have the right idea.