I like the last sentence.
But let's be realistic:
1. The floor for completed or near completion units will not drop to 30% from peak, or even worse, from OP, because there are still enough investors ready to buy to rent for a 10% yield! The rental market will not crash, too many people are ready to upgrade or to move from Sharjah and Ajman to Dubai if affordable.
2. For projects by sub developpers, just or not yet started and in the middle of the desert, people pay typically 10 to 20% each 3 to 6 months. But since credit is no longer available, people stop paying. Even if you have the cash, you also stop paying because you don't trust the sub deveoppers and/or you fellow investors. As a result, the developpers will halt building. The floor here is not 30% from peak, it's less than that!