Is it permissible to invest an interest-free loan – provided by the state for an industrial project – in real estate and finance the project from the profits of the real estate, and is it permissible to save money if the project cost is less than what was stated in the feasibility study?

If the government loan for youth does not involve usurious interest or unlawful conditions, then it is permissible. However, the agreed-upon terms of the contract must be adhered to, such as utilizing it for investing in land or similar purposes. It is not permissible to use it for anything other than what it was designated for, except with the permission of the granting authority, as the Prophet, peace and blessings be upon him, said: "Muslims are bound by their conditions." Therefore, you can refer to the granting authority and seek their permission to change the intended use of the loan. If they grant permission, it is permissible; otherwise, it is obligatory to invest it as agreed upon or to decline the loan.