I've got 4 NVidea Tesla K80s + Xeon E5-2695 (56 cores).

I know this might be a vague question, but if I joined a mining pool... and could mine for atleast 8 hours a day. Do you think I could make "any kind of money" with it? I'm not talking about a profit here. Just to know a minimum possible return in terms of this hardware. I've been off the scene for a while and I'm not sure if this hardware setup is relevant by today's standards.