Yea, the numbers are rough and I included the monitors, sound systems, various chargers, two printers and other things. I figured roughly 300w per system with the big machine pulling a bit more than that because of the drives, but even at 150w, that's $500 a year and that does not include the additional power needed to cool the house in the summer. It's like running a 600w space heater all the time. Got to get rid of the heat sometime.
In any case, I power down as much as possible each night not only for power but also for safety. I have everything on a power bar so it's easy to just flip the switch. Anyway, we get some really intense lightning storms like I've never seen back in Chicago and it has a propensity of blowing equipment. Still not fully recovered from the last storm where we lost almost $1000 worth of hardware. Looking into a whole house surge protector at the moment.