The gift is made when instructed, after vetting, not at the same moment as the application fee. That sequencing gives some room, but no official schedule promises a particular number of weeks between steps. Plan for the possibility that the instruction arrives earlier than a slow sale completes, and keep an alternative source of funds identified.
Match funding dates to steps you cannot control
Illiquid assets move on their own calendar: a buyer's financing, a fiscal year end, a partner's consent. Government steps move on a different one, and vetting, the gift instruction, the EB-1 or EB-2 determination, visa availability, and any interview each carry their own uncertainty. Rather than fixing a completion date, list the points where money must be ready and ask what happens if a sale slips past one of them.
Hypothetical example: a household whose main asset is a commercial printing business agrees a sale that completes over nine months in staged payments, while the gift instruction may arrive at any point after vetting. A first review would identify the months in which the two calendars could collide and ask what bridging arrangement exists for those months specifically. It would also confirm that nothing in the sale terms makes the funds conditional on an immigration outcome, since the payments here are not investments and cannot be structured as though they were returnable.
Naming the alternative source of funds now is far easier than arranging one under a deadline.