3000$?
there's like MAYBE 1500$ in cards there, add 500-700$ for parts....
plus 140mh/s brings in like 250$USD a month on the only algo its really good for: ETH
so 12 + month ROI, assuming no diff changes, NO THANKS!
The cards are going for about $400 each now, so your estimate is quite a bit off. Thank you for taking the time for that post when you simply could have scrolled past it and taken your negativity elsewhere