Evidence preparation and project review can begin while a sale is pending. Whether the investment and petition meet filing requirements depends on the actual arrangements and proof of capital invested or actively being invested.
Treat closing as one dependency
Gather acquisition records before the sale, then add the final settlement and payment trail when available. Have counsel assess any commitment that depends on a future closing, rather than equating a signed purchase agreement with available capital. Allow for document gaps and transaction changes.
Neither a closing date nor a project reservation establishes an immigration completion date. Treat closing as one dependency among several rather than the event that starts everything. Much of the preparation can proceed beforehand: the acquisition history can be reconstructed, older records requested, ownership documents obtained and translations arranged.
Doing that work in advance also reveals gaps while there is still time to address them. What cannot be settled before closing is the net amount, so avoid committing to a figure until the statement exists. Where a sale is subject to conditions or a holdback, identify when each resolves and what happens if one does not.
Beginning the retrieval of older documents early is almost always worthwhile, since institutions holding decades-old records respond on their own schedule and no part of the process compensates for a late start.