I will calculate the ROI and check, I’m not sure how you came up with only 2 months and 15 days, are you sure this is accurate? each miner makes aprox 30$ after electricy, so 10 of them would be making 300$ a day, which is 9000$ a month, the investment is 63500$, 63500$/9000$ is about 7-8 months, can you explain the 2 months and 15 days?
He forgot to adjust the difficulty adjustment
The calculator is set on default for the last 1 month adjustment of -46.54 so the 2 months and 10 days is for the difficulty adjusting down by -46% every month.
If you switch that off it becomes 8 months, put it to +10% and it becomes never!
makes sense now ty