Default 50+ Legitimate links from same IP?

Hello,

I have dedicated server and all my sites have same IP.

My plan is to build 50+ unique blogs with unique content, different design.. and when they get indexed and PR to use them to promote my other niche sites.

So is it OK with google if my niche site get about 50 links from 50 different domains on the same server? Each post would be unique and have only one link. Posts will be created through cca. 3 months to look natural.

Thank you

While there is not going to be any penalty it is not going to be all that effective either. Even changing the designs and content it will be pretty obvious that you own all the sites. If it was that easy nobody would be spending all that time and energy spreading their hiding ownership and spreading sites out over different IP's.