It's been answered
You can do short runs, but it should not be the only thing you do
The generator needs longer runtime to warm up and remove moisture etc.
30 minutes one a month is for a generator in storage
The more short runs you do the more often you need a good run to dry it out
Say one a week for at least an hour
It takes my coffee maker 10 minutes to do make a 10 cup pot
What are you doing (1) cup at a time
I assume you are drinking more than one cup per morning, just leave the general running until you are done with breakfast and coffee your batteries and generator will stay healthier