Haha. I thought I heard a large number of GPUs @ ~$3k each…like over 140 of them [emoji33]
Can’t imagine loaning my 14 year that much [emoji15]
GPUs are difficult to get hold of in any numbers too, especially at MSRP.
So, if I use the top end GPU that is 122 Nvidia 3090 GPUs @ ~$3500 MSRP each is $430k. Each GPU is 121M/h paying about $9.50 per day depending upon the pool and the ETH price.
122 GPUs x @9.50/day = $35k/month.
They could use cheaper GPUs and get more of them but less $/day each. Of course they could have some ASIC BTC miners in their mine too which would change the calculations.
You can build a small 6 or 8 GPU rig that generates profit. But it depends upon which GPU for the cost and the profit. Red Panda Mining and VoscCoin on YT are nice channels to learn about the processes involved.