@silverwizard so, ballpark, it very much depends on the GPU class. That's your 90% cost, no joke.
ASRock 8U8X-TURIN2 I can't give numbers on, as it's prelim. So, you'd be looking 4U8G-GNR2.
Base chassis, ~$8-10k.
CPU, >=$6k.
RAM, >=$4k
GPU, minimum is going to be NV L40S - MINIMUM.
Those are $12k. Each. Minimum. To actually get them expect to pay $20k. Tariffs push that to $19k before 'fuck you' premiums. That's PER GPU and only 48GB which limits the models significantly.