Process, numbers and paperwork
Project registration, the escrow account and the construction percentage are public and take five minutes. The developer's balance sheet is not. Here is where the line falls.
Off-plan instalments go to a project account at a trustee bank and are released only against certified construction progress. What that covers, and what it does not.
Assignment becomes available once you have paid the threshold written into your SPA, typically 30–40%. The procedure, the fees, and the points where these deals fall apart.