Just go to your local computer store and buy the motherboard in stock with the most PCIe slots and start mining tonight instead of waiting for all your stock to arrive and the profitability starts to decline.
You are losing at least $5 USD a day per GPU that your GPUs are not plugged in.
Most of your components you can buy locally however for the risers .... "You might have to overnight them from China". Since computer stores generally don't sell them.
how long do you expect ETH to be this profitable
and its late now but tomorrow will get all the hardware i need but the only thing i cant find is the PCI risers
Nobody knows how much longer it will be profitable. If I knew it would start collapsing tomorrow, I would have sold all my GPUs today.
Its anyone's guess.
Then you gotta find them on eBay and pay for express shipping. Without the risers you can buy motherboards with like 4 PCIe 16x slots and just plug it directly into the slot and avoid the need for risers.