There are a number of ways I think money can easily be saved on set. These things may seem mundane, but Rockefeller saved millions just by reducing the number of nails used to seal a barrel of oil.

Ice

How to save $5-15/day on ice:

• Always load drinks first, then ice. Cold falls, heat rises. Also, you'll fit drinks more densely in the cooler.
• As ice melts, DON'T drain all the water. If the water is still cold, it's helping keep the temperature in the cooler down.
• Buy ice in the evening, and keep in a highly insulated cooler (Yeti or Comparable) on set or in a production vehicle. It will keep for the morning. This saves precious morning time and ensures everyone gets proper sleep.
• More details:

General Crafty Purchasing Strategy

How to save hours of time per week and reduce overall cost:

• Plan carefully. Buy in bulk once a week, or once over all, rather than going to the store every day or two. Save crew time, gas money, and more.
• Some storage space will be needed.
• More details

Crafty Distribution Strategy

Save time by prepping ready to-go crafty sets:

• The plastic container is great for setup. If those responsible were to buy in bulk and have 3-5 such containers, it would enable office PAs working near the crafty storage (in this case - at the church) to assemble and deliver a specific number of crafty sets per day. This would enable better cost and consumption tracking data. This would reduce crafty set up time, store time,

Coffee

30-100 cup coffee percolators take 10 minutes to prep per day, and save ~$30/day over commonly used Starbucks Travelers (96 oz for $25 each) which take time to pick up.

Meals

Collect meal choices via google forms. Use COUNTIF formula to calculate number of meals in the resulting sheet. Have 3-4 choices. Include spaces for folks to elucidate any dietary restrictions and concerns.