Im Seo'ing for a local carpet cleaning business and am having a hard time finding niche related links. Ive decided to build a pr0 link network to provide unique niche related content. My question is : When building tier 1,2,3 links to my network, how relevant do my links need to be to carpet cleaning. As I said there arent that many links for that niche. I want to build some links with PR and am not really sure what kind of links to build for this new network. Can I build irrelevant higher PR links to tier 1,2,3 and just rely on my tier 1 blog network for relevant content? And if so what higher PR irrelevant links should I focus on?