Or a small wind turbine depending if your location favours one of these. I just sold my home mining gear yesterday. It was 3.2TH and generated just under 1BTC per month. Sold because it's just not worth it.
It's the setup cost that makes it so hard. Could they do it, sure. But cost compared to regular electricity just makes it not practical to do.
yeah because you basically pay in advance the cost of electricity of many years(if your is cheap), it's like gambling to be honest
and for this you won't see any profit for a long time, meanwhile btc can fall and you end with a great loss, not a smart move to do
in mining is better to diuite your costs, what i mean is that it's better to pay small amount but frequently, than investing big amount and don't pay nothing for months, the latter is better for trading i guess