At least for me and I'm sure for some others it's a hobby and just kinda excepted the higher electricity cost as part of my hobby's expenses. And as the others

At least for me and I'm sure for some others it's a hobby and just kinda excepted the higher electricity cost as part of my hobby's expenses. And as the others said, at idle you'll be using a lot less power. That said you can run home servers with WAYYYY less power usage if you prefer. Single board computers are good bets, like the Raspberry pi 4 only use a max of ~15watts. Repurposed laptops have low power usage too.