Yeah, your best bet would be to get a few servers.
By "Cheap" what do you mean? What is your budget?
Only someone who is running a website which gets masses of visitor by the thousand a minute would need this sort of bandwidth. But then someone in this position would know that this is not available on one server?!
If you're new to servers, you really wouldn't need this much space unless you are getting around 100,000 hits per hour or alike.