This estimate is from the top of my head to give you a rough picture of what an inexpensive budget build costs but actual prices may vary.
8x GTX 1060 = 220*8 = $1760
1x MULTI PCIE MOBO = $80
1x 64 GB SSD = $30
1x 4GB RAM = $30
1x 1200W SERVER PSU = $120
Based on those listed above, other peripherals not included, building a rig will cost you a total of around: $2020
And I suggest you go with this last option as the cheapest one which would still do you about 15 USD daily with current bitcoin price and using Claymore Dual Miner 10.2 mining Ethereum+LBRY, a hashrate for such card goes 23 Mhash/22.7Mhash when overclocked like you should.