Right - BitcoinWisdom is the best option in my regard.  Add in your hardware cost there as well - and it becomes pretty clear how soon you break even (if at all).  Don't forget to factor in things like power supplies, cables, etc..  Also - better to estimate 10% less than your expected hashrate.  For a larger farm, you'll probably have to send some boards back to China for repair.  One of my miners currently is operating at 70% due to some less than ideal environmental condition.

In my case, I'm currently mining with very low cost electric (much lower than you have) and a small farm of S7.  It's going to be a long time before I break even