Blog script installation and hosting

I'm looking for a simple Blog Script where an unlimited amount of members can join and create their own Blogs on with rss enabled feeds on each page and photo uploading on the Blog. I am also looking for installation and cheap reliable unlimited hosting of the Website Blog and my Domain name to be incorporated at the top of each page.I will go to a maximum of $50 for the script and installation, so don't bid if your price is above this.