That's what I was researching, from what I've read the K7 is the newest, and I've read it can earn 600 Canadian a month, price I found on Amazon was $12,800 Canadian. So would not take long to pay for itself. Do you know what the newest version is or where to gather accurate information on so.
Discussion
I only fuck w BTC these days. Whatsminer M50S or Antminer XP. You have to remember difficulty adjustments are a part of the equation as well. And halvings!
As for a place for more info, I learned what I know from hours of reading from all the sources. Followed w some trial and error. Check out Kaboom Racks as a place to buy.