In India you cannot get free electricity as the cost per unit is high here. Due to which nowdays nobody is interested in mining as the cost of land and electricity takes away any profit if there. Instead people invest in coins directly.
You can try solar panels to get electricity but those panels come at high price so its the same thing only.
You can convert a room in your home into an office, or rent a commercial space, register an SSI unit. and get electricity (3-phase) for industrial usage. This is by far the cheapest method. The price in my place come as low as 4.5 INR/Unit.