I self-host on a 3-node Kubernetes cluster in my basement. It runs on three off-lease HP DL360 1U servers that I bought for about $120 each. I work heavily with Kubernetes in my day job, so this also gives me a playground for things that I may need to know about for work, or also things I'll _never_ need in my day job, but are good learning opportunities anyway.

I have an overspecced solar install on my roof that make the electricity used by the cluster essentially free to me, so the only recurring cost is business-class Internet service.