At present, before the real estate license is issued and transferred to you, the property right does not actually belong to you.
The risk is that if the house price rises sharply and the other party defaults, you will lose a lot.
Because the housing sales contract needs to be registered, there is no title certificate, and the subject of the sales contract does not exist and cannot be registered. This is not a valid contract. Notarization also has no basis.
Even if the notarized future transfer option is established, the notarization fee is 2% of the house value, and the cost is considerable.