IMO, kubernetes is overkill for a small non-homogeneous home cluster.
What I use and really recommend is using systemd +/- docker. It just becomes so darn simple. Do not go the compose route (that route is filled with sadness of the incomplete stacks because db container failed silently kind) - instead aim to decompose the compose files and write a separate systemd service file for each of them, you can then assign limits separately.
I don't want to set anyone on the path ... but I use NixOs and this is so easy to do there.
What I use and really recommend is using systemd +/- docker. It just becomes so darn simple. Do not go the compose route (that route is filled with sadness of the incomplete stacks because db container failed silently kind) - instead aim to decompose the compose files and write a separate systemd service file for each of them, you can then assign limits separately.
I don't want to set anyone on the path ... but I use NixOs and this is so easy to do there.