While others are "Out of Stock" #minehive bitcoin cloud mining farm (
https://minehive.eu) has more than 500 TH/s of mining power to offer just for 70 USD per 1 TH/s!
With your electricity deduction, using S9's, it seems like a zero sum game at the moment.
It's not really zero, it's still profitable. But you are right - electricity price is main challenging issue we are solving now.