why not just set your own miners?
we need cheap electricity, or we need solar panel for using mining for bitcoin. for the future.
Solar panel is best to get the cheap electricity.If you have a idea of doing mining so,go with the solar panel for electricity.For solar panels,you need to inverse only once and later all the Electricity from the panel's are free of cost.From the solar panels you will get very cheaper Electricity as of my knowledge.