Stratcat wrote:

1] You aren't concerned about power consumption or climate control costs.

though they are slow machines, they are still 50 machines, none-the-less.
Quite a fleet! I'm going to take a wild guess (very wild!) & say you'll
get
at least  ~35+ WU's/day (???), but that's a real 'shot in the dark', on my
part!  = )

Remembering the WaterCooled PC heating the aquarium project, wouldn't it be
possible to use the waste heat produced by that fleet, for heating the
house and maybe some hot water? :-)