Replying To [haileyqd]:
Seems to me that the customer has budgeted to pay you the Deposit in September, not now. Quite frankly, the customer does not care if the workers are farmers who have to harvest crops. All he cares about is the goods he ordered, when he wants them and when he will pay the deposit.
You have one of 2 options.
1. You take the risk and produce now, and wait for September for the Deposit, or,
2. You try and mass produce after receiving the deposit and try to meet the November deadline.
If 1., then you run the risk that you might manufacture the goods and NOT get the deposit at all, and you are stuck with the goods.
If 2.,then you run the risk of not finishing production in time for November delivery.