in the meantime  this one is on sale


https://www.newegg.com/Product/Product.aspx?Item=N82E16813138424&cm_re=biostar_b150-_-13-138-424-_-Product


70 bucks before the code below



022BW44



35 bucks  it will do 4 cards

that allows for a small psu

you can use the g4400 cpu

https://www.newegg.com/Product/Product.aspx?Item=9SIA6KX4BD2910&cm_re=intel_g4400-_-19-117-625-_-Product

or a used g4400t less power

http://www.ebay.com/itm/Intel-Pentium-G4400T-2-90Ghz-SR2HQ-LGA-1151-Socket-X626B529-Processor-/262837490473?hash=item3d3255d329:g:WpgAAOSwUKxYjPLK



so 35 + 52 = 87 for four cards