Can someone help me figure out the potential return if I buy into this? I have found a calculator, amplified the difficulty to what seems to be expected come march, put in what I think are the correct numbers for everything else and I am seeing a pretty nice return. So I can't help but wonder if I'm doing the calculations wrong with the calculator.

Anyhoo, here is the info I'm referring to:

https://www.blackarrowsoftware.com/store/rent-some-minions-4-months.html

Can someone who actually understands this help me out with some input?

Thanks a bunch.