How much electricity and time would mining a bitcoin consume right now?
The amount of kilowatts needed to mine a bitcoin depend on the hashing your setting(rigs) can produce, so 15 000 kilowatts/hour of power is not a good metric

There is plenty of website that allow you to calcul if it can be profitable to mine bitcoin, based on your settings of 0.003 USD per kilowatts/hour yes it is

https://www.cryptocompare.com/mining/calculator/btc?HashingPower=40&amp;HashingUnit=TH%2Fs&amp;PowerConsumption=1500&amp;CostPerkWh=0.003&amp;MiningPoolFee=1