the config is OK, except one thing - GPUs - is it relly wise to buy NV gtx 1070 which cost about $400-420 and push 30 Mh/s on ETH instead of RX570 8GB/ RX 580 8GB card, which can push ( after tuning) same 30+ Mh/s but costs about $290-320  - that is actually 35% difference. this is huge man.