I am doing such a Project at the Moment(My first attempt) and Yes an article on doing to will Help or a dedicated forum attached to the Computer Hardware section...So long as It does not become too Technical(Plain English)

From what I found out that Biggest issue has been the logistics of assembly (and buying some small Items such as case screws) and I have stayed within budget and got higher quality/performance Items at Discounted prices

Will share my contact details if you like?

Biggest Price (and I think I can get it down?) Has been for an Operating System Disk ...I want Windows XP Pro (OEM) yet its anything from 75 pounds to 150 pounds