This project is too big to fail. Impact will be severe if it does, especially on the banks' balance sheet.
Note that this project is on a "white site". If Sands is unable to complete the project, I believe the govt is entitled to take back the land. Temasek will then simply nationalize the project. Since Sands already paid for the land cost, Temasek will use that money to complete the construction and get either Sands, Harrah, Wynn, or MGM to operate the casino... and Mr Lee gets a free casino in the process! Rest assure our learned and well paid Mr Lee already thought of that contingency plan.