Oh, a preface... My rent includes electricity. So no matter how high, my rent doesn't change. 
I'm pretty sure your landlord will come knocking on your door if suddenly your electricity usage costs him a few hundred extra dollars a month.I was looking at SHA256 profitability on CoinWarz.
The problem with coinwarz is that it only gives you an instant snapshot of profitability in that moment in time. It's great to see what coin might be worth pointing some hash to right now, but it does not offer you any insight into the future. As philipma1957 pointed out, bitcoinwisdom provides a bit more information and can give you a better picture of your chances at making a positive ROI. It isn't perfect (for example, you can only assume a static difficulty increase percentage, and you can't factor in potential changes in BTC->fiat ratios), but it's a pretty good way to estimate things. 
