I’ve made an estimator that is often used to determine what kind of earnings you can expect with a single /24 subnet. It’ll go over 20TB, but it’ll take time. At the current rate a little over 2 years.
It might help you decide what to do. But keep in mind this is based on recent network behavior and there is no guarantee that stays the same. I try to keep it up to date if there are significant changes in network behavior though.