I know that when building a product, most of the focus is on making it work, or acquiring more users/paying customers, testing, etc.

But when you consider the business side of things, when do you think is the best time to intentionally set up structures in your business to regulate things like internal operations, team management, hiring, expense management, company culture building, and so on?

At what stage should I begin to obsess about those things and getting them right?