Just re-upped for Community Subscription on my 2 Proxmox hosts. Proxmox has been great for me, and I highly recommend it if you're dedicating a box to hosting VMs. If you want functionality like HA and moving running VMs you will need to pay, but... So far I think the team is doing a great job. https://proxmox.com/en/products/proxmox-virtual-environment/overview
ProxmoxProxmox Virtual EnvironmentProxmox VE is an open-source server virtualization management platform.