This is correct. It's really more of a mindset than anything. You take a guess at how much something will cost based on a quick calculation (good cloud provider

This is correct. It's really more of a mindset than anything. You take a guess at how much something will cost based on a quick calculation (good cloud providers make this easy, some cough Databricks cough just use a black box and bill you whatever they feel like) and then once you test it at a small scale, you verify that it's as expected and continue to monitor.