I am certainly not the most recognized expert in the world.
> If your tools and data are at all business critical to a real company you are vastly undercharging
I make around 90% of my revenue from flat rate prices. The hourly rates are an additional service. The majority of my clients pay quarterly flat rates. For the typical client, I only have to set up a generation script once, which takes around 30 minutes. I usually never touch that script again for years.
> [...] hardly a business achievement [...] That is a third less than a random handyman will charge where I live.
Sorry, but I really couldn't care less. I never actively planned to do this side gig. I got into it because people cold-contacted me and asked me for it. I very much enjoy doing it, I like the industry contacts it generates, it's only a few hours work each month, and it pays off my mortgage. It's mostly a paid fun hobby project.