I won't go into detail unless it's requested, but choosing the wrong corporate form cost my business a multiple of the $9K sum the OP mentions in taxes and legal fees arising from the lack of protection afforded by the right form (which was for us an S corp). If we'd done it right in the first place by shelling out the money to a good attorney, we've have saved some scratch and more importantly, time.
Bottom line, this advice is just really dangerous. The pennies saved by not consulting an attorney or by self-researching can end up being very costly, and the worst part is that you don't know what that cost is until you find yourself with a big tax bill or a liability you didn't forsee when you were trying to play lawyer.
I may be committing the sin of taking my own experience and making a rule out of it. Having been through some nastiness that could have been avoided by paying for good legal counsel makes me twitchy about this issue.