Hello, First time posting here, yet I need a lot of advice.

I am planning on making a site where members can post pages organized into categories. Guests could then browse the pages through a category page. Almost like a fourm, yet the first "post" would be most of the page, and the subsequest posts would be the comments to the page. The guests could then rate the page via the comments. Almost like Widgetgallery.com

How would I do this? Is there an easy lazy man way, or do I have to pay sombody???

Thanks- K9