Thanks for taking the time to break this down. It's important for people to see the challenges of content creation in a v4v ecosystem.
As I see it, nostr is still in it's infancy. As a result, trying to make a living here isn't going to be workable for a while. We need more user adoption and we need more bitcoiners.
That will take some time, but NGU will likely help both cases and it will increase your savings if you were able to hold on to what you earned. Which indicates this can really only be a side hustle for now until there is greater adoption, but I believe we will get there.
The work you are putting in now to create a reputation may pay off to be valuable in the long term.