Miners profitability

Quoting my own post from:

The ROI would be 91 days. This is equivalent of an income of 600/91 = 6.6$ or around 19 Grin per day. The question is if the G1 Minin is available though, their website that the first batch has sold out, you have to contact the sales from iPollo:
https://www.ipollo.com/ipollo_en/interhashMikecrm.html