Good question. Creating a Page on Facebook is Free and easiest part. However, getting value of a Facebook Page requires significant effort. I hope you are aware that because of Facebook's Newsfeed Algorithm (also known as Edgerank), a small % (around 5-10%) of your Fans get to see your post. In order to increase this reach you would need to engage with really higher % of your fans and that requires great quality of content & efforts to create engagement around that.
Unless you are clear that you've required resources & skills to create high quality content and engagement around it, you should not think about creating multiple Facebook Pages.
Hope this helps? Let me know if I can be of any further support.