Collect everyone's orders and payments in one place, then send one combined order to the business.
If you set a minimum, customers see the order as conditional until it's reached. Payments are taken at checkout and are not automatically refunded if the minimum isn't met, so only set one you're ready to handle.
You are the seller. Customers pay you through your Gatherly payment setup, and you pay the business. You're responsible for the order, refunds and questions. Orders can't be paid until your payment setup is finished.