Forfeited deposits, duplicate housing, storage, and rebooked flights are the usual ones, and none of them are recoverable from the program. The US$15,000 fee is nonrefundable regardless of outcome, and the gift is not refundable equity. Other visa, medical, and professional costs apply on their own schedule, often before any relocation spending begins.
Favour cancellable arrangements
Compare the cost of flexibility with the cost of being wrong. A slightly more expensive refundable fare, a month-to-month rental, or a storage contract with short notice can be cheaper than a forfeited deposit and an emergency rebooking. Ask each supplier for their cancellation terms in writing before paying, and record the last date on which each commitment can still be undone without penalty, then share that list with everyone making arrangements.
Hypothetical example: a household whose principal owns a machine-tool import business books a shipping container and a lease start date on the strength of the fee payment, then waits eleven months. A first review would have compared the premium for cancellable arrangements against the exposure of fixed ones, and would have found the premium to be the smaller number by a wide margin. It would also have recorded, for each supplier, the last date on which the commitment could be undone without penalty, and shared that list with everyone in the family who might otherwise pay a deposit.