Squeeks, why exactly are you running on a dedicated server anyway? While you got a good deal, somehow I doubt that 4-ch needs two terabytes of data transfer at this point.

Unless you're also using it for something else, shared hosting may be a far cheaper alternative. If 4-ch even gets large enough that it eats more than 100gb or so, then you can move to dedicated.

Cyrilthefish's host currently offers 120gb at $9.95 monthly, which is quite sustainable (for you at least, I don't know what the hell they're thinking though...).