@ronott1, I followed your method of starting a batch of sourdough today, using only 1 Tbsp starter + 90g each of water and flour. The timing in your method calls for finishing the stretch-and-folds around 9 pm but I am not usually up that late. I did everything 2 hours earlier, starting around noon. Looking forward to baking in the morning instead of after dinner, as I've been doing.
I was surprised that a single Tbsp of starter could be so effective in raising the dough, but it did great and the dough has a wonderful elastic consistency!
Now what should I do with the huge amount of starter I have?!?