The Threadripper is a mighty beast and many are happy with using this part for V-Ray and other renderers. The companies we work with are choosing EPYC CPUs for their render farms when they have a large number of employees who need to access and require 24/7/365 use. The EPYC is great for the reliability and security. Many are also choosing the 1-socket servers since you can get the density and I really like the new ASUSTeK 6-node, 2U server - a very clever design. I am not sure V-Ray supports, but that is 768 threads in a 2U form factor!
The V-Ray minimum hardware requirements are pretty light. AMD only validates Windows Server 2016/2019 for the EPYC CPU, but it can run with the latest Windows 10. I like what Puget Systems does for their customers to help identify the right hardware to use. https://www.pugetsystems.com/recommended/Recommended-Systems-for-V-Ray-199/Hardware-Recommendations
