I’d say in theory your ISP could notice and throttle your ports. But it really depends on your contract and the policy of your provider and their terms of service. They might restrict over use, sometimes labelled as “fair use” policy or commercial like use if it is a private line.
Before setting up such a massive storage quantity, you should make yourself familiar with the current network status. Though we don’t know specific details it is generally assumed in the community that most of the traffic on the network is still test data with only few customers. One of my node had its peak of ingress traffic at 25 GB in a day this month. So setting up 60 TB obviously won’t fill up for a very long time at such a rate.
That is why it is not recommended to invest in hardware and huge storage capacities: Few customers and low utilization currently so it takes long time to fill up and pay off. It is absolutely no problem to grow with storage space demand, you are free to increase your provided space any time or even set up new nodes.
We hope that the new hires in marketing/business development will help to get more and hopefully big customers on board.
For info similar question: How much are you guys making on average per month…?