6 months of stable mining.  6 * RX 580 4 GB 
Rig runs 6 months stable at 165Mhs ETH and 4250h/s DCR.
By http://whattomine.com/ as the link can prove you can make at todays rate $6,888.70 ( 25/01/2018).
Electricity: $1095 (1300W from rig at 0.10$/kWh)
Annual proffit: $5,793.70. 
The prices of the graphic cards are astonishing. Do not lose a chance to have the return of investment in 8 months. If the currency will increase in value watch your investment growing exponentialy.
Please do not hesitate in contact us.