The fee and the vetting come first, and the gift follows successful vetting. After that the family proceeds under EB-1 or EB-2, so classification eligibility and visa availability govern the remaining timetable, and neither is within the applicant's control.
Payment does not end the queue it joins
Hypothetical example: Bastien wants to know what he controls in this sequence and what he does not, once the payments are made. The framework's own steps are the visible part and probably the shorter part. Vetting has no publicly guaranteed duration, and until it concludes successfully the gift is not made.
Once it does, the family enters an existing employment-based immigrant classification, and everything that ordinarily governs those classifications continues to apply: whether Bastien meets the requirements of the category, whether he and each family member are admissible, and whether an immigrant visa number is available when the case is ready. Delay therefore lands in two different places. It lands on the nineteen-year-old, whose eligibility as an accompanying child ends at 21 regardless of where the file has reached.
And it lands on the family's plans for the business, since a transport company does not run itself from another country. Both are reasons to obtain a realistic timetable from an attorney before committing money rather than after.