Is there any sense to do mining Ethereum with the current mining-difficulty?
What about ROI of the mining,
and when the consensus will be switched on Proof-Of-Stake, on which block?
If you are looking to sell immediately after mining then no renting rigs will be an expensive affair but if you are willing to wait in a hope that price will go up during the ETH 2.0 FOMO then it could be profitable IMO but the problem is there's no date for launch yet.
Totally agree with @bkbirge here it's better to buy off ETH at the market instead of buying new hardware for mining because once FOMO about ETH2.0 hits mining difficulty will go through the roof.