First...
WhatToMine has it at $19.35/day and only using 1680W.
Goliath will make $41.90/day on Nicehash (just cryptonight) @ ~4kW
and $114.78/day on neoscript
Second, show us the system and where to get it as well as the stats please? I'll take 10 of them.
Sure, I posted it in another thread. Just buy used DL580 G7s. They have 12 PCI-E slots (with the PCI-E extension board) and typically come with 4x 1200W PSUs. Just buy whatever 12 video cards you want, 12 risers, build a little rig to hold the gpus for $10, and the PSU adapters so you get the 8 pin output (or go with the break out board that allows you to wire in). $800 +/- $400 (depending on whats on ebay at the time) + cost of GPUs. They have 4x 10 core processors (typically, some of the servers on ebay have older 8 core processors).
Can buy everything you need except the GPUs on ebay. Hell, you could buy the GPUs there too but I don't know if I'd trust them. I found some pretty good deals on used tesla equipment too (since you're a nvidia fan).
Since I posted it in another thread a lot of people have been picking ebay clean of the cheap DL580 G7s.. But there are still some available... I stopped mining with GPUs awhile ago and am mining with other solutions.. If you want the cheap DL580 G7 you'd need to setup alerts on ebay and check regularly. If you don't care so much about CPU mining you could also go with the DL580 G6, the DL580 G5, etc. The G6 and G5 have PCI slots and less PCI-E though. Not sure exactly how many. But they're also significantly cheaper, you can get the G5/G6 for like $100-$300.
Example: https://www.ebay.com/itm/Premium-HP-DL580-G7-Server-4x2-26GHz-32-Cores-48GB-RAM-P-410i-iLO/172908198868?hash=item284221bbd4:g:jRIAAOSwmkpZ57Tx
If the server you order doesn't have the PCI-E extension board you can just buy one.. Here's one for the G5.. https://www.ebay.com/itm/HP-449414-001-System-I-O-PCB-PCI-E-PCIe-Express-Board-ProLiant-Server-DL580-G5/282582004180?epid=6006039039&hash=item41cb3331d4:g:SGwAAOSwBt5ZEXZj
Here's a G7 with no riser and no memory (just buy it separately) for $200 -- https://www.ebay.com/itm/HP-Proliant-DL580-G7-4U-Server-4x-E7530-6-Core-1-86GHz-No-RAM-HDD-DVD-P410i-RPS/172980741588?hash=item284674a5d4:g:zMEAAOSw5VtaCcqE
Here's a G7 IO / Expansion board for $120.. Add it to the server above for $200 and you get 12 PCI-E slots + 4x 1200W PSU for $320 (just add $50 of memory and $25 ssd)
here's a cheaper G7 IO expansion board only $66! https://www.ebay.com/itm/HP-DL580-G7-PCI-E-Riser-Card-588137-B21/172984027345?hash=item2846a6c8d1:g:BaUAAOSwCU1YwEqh
Plus, these systems all have ILO remote management which means you can hard reset the server remotely! look ma' no hands!