At work we use separate clusters for various things. We built an Ansible collection to manage the lot so it’s not too much overhead.
For home use I skipped K8s and went to rootless Quadlet manifests. Each quadlet is in a separate non-root user with lingering enabled to reduce exposure from a container breakout.
Yeah it is a bit of a pain. I currently only have a few users. Tooling-wise there are ways to tail the journals (if you’re using journalctl) and collate them but I haven’t gotten around to doing this myself yet.