I have a big enough house to be able to put this machine somewhere out of the way but there are plenty of cheap server gear on classifieds. I paid ish 300 euros for a 32 core machine with 40gb ram. I can host all the things without it even breaking a sweat.
Probably uses a lot more electricity, but I haven’t really noticed it on my power bill
Feel like this would have made a great theme for Photoshop battles