I'm fairly curious as why you need "30-50" CPU cores and .. 64-128 GB RAM and to think about what you actually need before making decisions.

I run a "lot" of VMs as well, in fact, I naively migrated a bunch of other smaller servers onto this one because it's OP!!!!!
My main compute server is an HPE Gen 10 with 80 cores and 128 GB RAM and ... I max out with "most", if not all of my VMs on at once around 10 to 15% until it crashes because I'm out of RAM by a doodoo ton.

50 cores sounds pretty overkill for 128 RAM, in my humble-pie opinion.