Currently I have the $10 package and Cpanel install. I offer hosting services to my clients so I have about 12 websites. They are not very heavy on traffic tho.

2TB of bandwidth is a lot but again everything depends of how big your sites are and what kind of content are you serving. if you are planning on running HD videos hosted in your website it might not last you very much. Additional bandwidth transfer is only 2¢ per GB. Also bandwidth only counts one way either outbound or inbound can't remember.

Hope this helps.

Good Luck!