not quite cheap, but years ago I "suffered" same situation, eth dumped to 200 usd and was not profitable but if I would have not stopped mining, the money I could have won is awesome, even without selling near the top...

so this time won't shut off my rigs even if I lose money for a while, 1-2 years is my estimation timeframe for starting the party again, thanks to btc halving so "mining" btc has more sense now than ever before hehe