I don't think this is a good time to start mining because if the difficulty continues to rise at this rate you will need very cheap electricity to make a profit.
Yes. The electricity price is too much for home mining. We can only mine during winter times. That is because we can get free heat out of it.
That is a cool idea, mining bitcoins to earn btc and also warm up your house.
Is that even possible, would it not be too much loud? Or a weird smelling air?