Hosted in a cloud: a VPN Lowendtalk Is an amazing community to get offers for those.

At home: truenas and gitlab.

At home, for work: I have an older HP workstation with an older Xeon with 24 physical cores and it runs a rhel (I have them for free as a partner) and I use it to run VMs for experiments and replicating infras, K8S, Windows AD stuff, etc.