Why do not you simply do this in a forum thread?, I have seen similar stuff in other forums/sites in the form of a thread/post and it gets a lot of attention. Once you get enough traffic, you can insert some adds inside your post and charge for it, you may also ask for tips.

The main drawback I see in doing this in a pdf is downloading, it takes time and you will always be afraid of it having virus; most people would prefer reading directly from the web.