Choose the sequence deliberately. Filing on one structure and closing on another means the facts presented no longer match the enterprise. Note also that a visa's expiry date and the authorized period recorded on an I-94 are different things, so extension planning follows the admission record rather than the visa foil.
Set milestones the deal and the case can share
Fix dates for the ownership model, the draft agreements, the funds documentation, and the review of the final package, then place the closing where it does not contradict the record. No processing time or approval is guaranteed, so avoid closing conditions that assume a decision by a given day. If the buyer needs certainty sooner than the process can offer, that tension belongs on the table before signature.
Record the end date, replacement arrangement and consequences for revenue or delivery. Do not make the transaction irreversible solely to match a generic timeline. Closing outright first puts the whole purchase price at risk of an unfavourable decision.