I started with a Raspberry Pi 4 4GB running Home Assistant with a bunch of add-ons. Moved on to a mini PC running Proxmox with some VMs (one for Home Assistant) and LXCs (NGINX Proxy Manager, Docker, AdGuard Home, Jellyfin and more). With a 4-core 8-thread Intel CPU and 16GB of RAM, it’s got enough power for my usage so far.
My router is a regular consumer-grade router, but it’s been pretty good at reassigning the same IP address to each of my services. My ISP doesn’t restrict my uploads and hasn’t complained about my self-hosted services, but there’s not much traffic as I’m the only one using them.
I’m also adding a NAS to the mix soon for more storage!
Would HAProxy work better as a load balancer? For work we switched due to some issues with NGINX; so far, the service has been much more consistent with pretty much no downtime, even when restarting server hosts.