You seem to be obsessed with optimising one resource at the expense of others.

If you want to push it and paint me as obsessed about something, then let it be this: providing this community with on-topic and reasonable advice

you’re only going to save a few MB of RAM.

This is false, and you should read once again my previous message illustrating why: on a decent “self-host”-friendly machine, the same software may work very well, or not at all, depending on whether the user would engage with very basic configuration. This goes beyond RAM (memory isn’t the sole shared resource), and I’m adamant that the alternative (which was “pretending that the problem doesn’t exist” turned into “throwing money at the problem”) is unreasonable.

On the other hand, if you’re doing it to learn more about computers then it might be worthwhile. This is a community of hobbiests, after all…

Or more importantly: the extent to which you can self-host out of sheer luck and ignorance like you suggest is very limited. If you don’t want to engage with a minimum amount of configuration, you might bump into security issues (a much broader and complex subject) long before any of the above has a material impact.