I tried to keep to a similar budget and made the build i would rather have for the price.
https://nl.pcpartpicker.com/list/Wb3wZc
cpu: 12700k - cheapest cpu with intel uhd 770 igpu
Mobo: asus something or other - has intel nic so theoritcally shouldn't cause you trouble and i like asus motherboards
ram: gskill 64gb 5200mhz cl36 - slightly cheaper ram that is slightly faster and personally i like gskill ram, its the only brand i purchase ram from anymore
cooler: thermalright peerless assassin 90 - its cheaper, should still fit in case and a reoccuring theme here, i like thermalright coolers
os drive - cheaper ssd - its as big as you need, significantly cheaper, from a trusted brand and for fun i made it a triple mirror
storage drive- 24tb exos, i like going with big drives and there are 4 of them because we can lol
psu: went for a cheaper 750w psu because you have no need for a 850w even at max capacity, we could go even smaller but this one is very efficient
edit: seems like i was typing this out before your newest post, so i'll look into it
edit 2: i would say just take my list and adjust storage to your preferred budget
you may even be able to find new exos drives for less on ebay but as i'm in a different part of the world than you its hard for me to check
just make sure with any segate drives your purchase, regardless of how trusted the retailer is, you check the farm data to see if it actually is new.