Im planning to invest a modest amount of fiat.

so i just want to know which are the best components for best rig for 5 or 6 gpu each one.

Im looking for the cheapest ofcourse but taking into consideration multiple factors like

the newest hardware, lowest electric consumption, basicly the most efficient hardware at the moment in thhe market.

i exclude the gpu because the specifications are very obvious, but i still can hear suggestion and reviews of gpus

what other things should i consider? im open to hear every suggestion