I have limited ram and want scale to zero for apps that use a lot of ram, but I only use one of at a time like game servers, or things that can be done over night while I sleep like media encoding.

The main reason I went to k8s, is for the not having to think about what machine will have enough resources to run an app, just throw it at the cluster and it figures out where there's capacity. And, I want hardware failing/getting replaced to be a non issue.

edit: I wanted to add that my hobby is not systems admin, I want it to be as hands off as possible. Self-hosting is a means to an end. I have so far saved over $200/month in subscriptions by replacing subscriptions I was using with self-hosted alternatives. I can now use that money on my actual hobbies.