1. $1500 for the cards, $400 for necessary pc components, $500 for liquid cooling and fan parts, and then should've been only $75 for case materials but i spent like $300. Would've been easier/cheaper to make one in autocad and get it manufactured.
2. ROI could take awhile ($8-10 net/ day at current rates).
3. Mining Ethereum & Pascal

The rig is very cool temp wise. Today, I actually was able to turn down the power to 50% tdp and still have it running stable with almost no change in hashtash despite dual mining. Temps are at 38c now and cut power draw immensely down to 440w.