Plus spending 2 to 4 times the amount in electric bills as compared to cheap hosting
and they would take up 20 times as much space, and would be a wiring hazard and
would need an industrial AC unit to cool the room. Did I mention it was a wiring hazard?
Wiring hazard is not an issue for any professional datacenter.
You aren't spending 3-4 times electricity bills because the s3 is equally efficient when underclocked.
The s3 wouldn't even take up more space when you consider cooling limitations. Even most high tech datacenters are incapable of cooling 55kw per rack so sp30s will need to be spaced out ~6-12u apart.
I estimate 12 s3s would take up ~9u which would be compatible with most datacenters.