itmv2,
I would say Ryzen family CPU is a good value for money and a good choice if you a need a quiet home lab and require less than 64 GB of RAM. Thats more than enough RAM for a couple of VMs
You can get a graphics card simillar to builtin for less then 30-50 pounds.
If you need more RAM than 64 GB and are willing to put up with the noice, then as suggested there are good used rack servers deals on ebay.
PS Personally I have 2600 Ryzen with 64 GB, running ESXi 6.7 without any problems.