I have over 2 dozen cards. And alot of hardware that was bought haphazardly when I originally started. Like 5 750TX power supplies which was originally bought but then replaced with 1200 watt ones. Alot of extra 'others' sitting around as well. I never bothered to return them and just keeping them cause I'll find uses for them eventually.
Everything (even the extras) all bought new from newegg. Been running for awhile and I've been running pure profit now. Everything I've bought has been paid for. So it's all just free money now. (Electric is free for me)
How do you manage to get free electricity for
25 or more cards?
That basically means that somebody doesn't miss $450 to $500 every month because, as everyone knows, electricity is never FREE -- though sometimes someone else pays for it.
Your parents too rich and/or proud to hit you up for the $450+ it's costing them every month?
Seriously, that should be more than a blip or "noise level" for most power bills -- even a company should notice that, nevermind an individual.