One more thing I might mention is that the difficulties that arose during Sarah's catering are likely because Sarah set about this in a lackadaisical manner. After all, this wasn't a "real" customer, just a friend she's helping out. If this were a paid service from the start, Sarah might have set about it differently focusing on assiduous preparation and flawless execution like she does with all her paying customers.

Just another thought.

Liberalism -- Ideas so good, they have to be mandated.