So I have a few mining rigs and was thinking about ways to make them cheaper. I thought about using a generator or possibly a series of batteries with an alternator hooked up to something like a workout bike.

I'm not sure how difficult these would be to achieve but I know the workout bike would most likely require a lot of exercise (probably more than 1 person could do). Maybe if you owned a gym? Or thousands of hamsters on their wheels.

But for the gas generator, has anyone tried this or know if it would be cheaper to pay for gas to keep it running?

There's also a way of using wood gas to run the generator I think but that might take some time to "refill" or loss of power etc.

Basically I'm asking which method would seem more reasonable to power miners?