Large professional miners spend on average $0.05/kWh on their mining ventures, including all other non-electrical overheads. So as a small miner with virtually

Large professional miners spend on average $0.05/kWh on their mining ventures, including all other non-electrical overheads. So as a small miner with virtually zero overhead, you should only mine if your electricity cost you $0.05/kWh or less. If you do, buy an Antminer S9. But personally I prefer simply investing in BTC.