Feel free to subtract 10%
Let me just point to this
Sure, if you change the scenario, the values will be different. I gave you the calculation for the scenario YOU described.
If you want an estimate for the first few years. Use this: Realistic earnings estimator
Spoiler alert, the 9TB would come down to about 462 USD after 2 years. Still a pretty great return on a 293 USD investment. And it would just get better from there.