Not my article, but I'm impressed with the effort. I've noticed the author of this blog does not post his stuff on BHW, which is a shame (someone posted the GSA SER guide a while back). Most of us make our own lists using Scrapebox and our own proxies, but it might turn out that it's more cost efficient to outsource this part of the equation. Not to mention the time and VPS resources saved... Pretty long read, but worth it IMO. Here is the link.