AFAIK the main difference between vSphere & something free like ProxmoxVE is the latter lacking automatic guest VM migration for load balancing. But I've never

AFAIK the main difference between vSphere & something free like ProxmoxVE is the latter lacking automatic guest VM migration for load balancing. But I've never worked with any VMWare product aside from tinkering with ESXi years ago. My (limited) understanding is that a well thought out DRBD configuration would be just as effective, & quite possibly a better use of finances.