So far ive used around 5200USD in equipment cost. and it has all paid for itself in the two months ive been mining diffent coins=).
So everything from now is gravy=), hope this currency will add some value and not be a power waste.
Every time you set up a GPU rig, also set up, with "nice", a minerd using its spare cycles on some under the radar coin or even throw one core at each of several, and forget about them.
Some day one pops into the limelight again, like BBQ recently did, and checking your wallet you find holy cow those things add up to more money than all the coins all the GPUs raked in combined.
-MarkM-
that is a nice tip, will certainly do this from now on=)