Doing it right takes longer the first time and way less time overall.

Speed on the first pass is borrowed from every pass after it. The quick version finishes sooner and then returns as corrections, confusion and a rebuild nobody budgeted for, all of it landing when you have less time than you have now. Doing it properly feels expensive because the cost is visible immediately, while the cost of rushing hides in a week you cannot see yet.

On the next thing that matters, add a little time at the start and set it up right. Label it, check it, test the small piece before you build anything on top.