No, not at all! If you have a look at post 2 of this thread, you will see this goal: 4. *Supermarket Sweep - 24 hour TIMED goal. during these 24 hours, wedding supplies are easier to acquire. You do not have to complete this step to continue. What you have collected will add to the count in your Parts needed. You will be able to get more later but the Trade changes to 6 hours.