Computer experts fall in and solve my problem! Xeon the cheapest workstation?

Not a computer nerd but i need another workstation and i came across intel xeons processors.

Apparently they are cheap af and it looks like the build can cater to my needs.
I need a computer almost on par as my current.

Threadripper 2970wx $1100 24cores48threads
128gb 16gbx8 3000mhz $560
x399 creation $400
gtx 1080

current setup cost me quite a sum of money but it caters to my workload

i came across intel xeons which i did some calculation, the setup would be almost 70% cheaper
E5 2695V3 x 2 = $150 each = $300 totalling to 28 cores 56 threads
X99 mobo = $125
128gb ecc rams 16gbx8 = $200 SE-ED
gtx 1080

so if dual xeon can give me 28 cores and 56 threads why is it cheaper then threadripper for 3 times the cost? xeon mobos are cheap as hell too, anyone please enlighten me about xeons