Case study - think out of the box

Case Study.
My friend told me this case. Mr. X is a retiree widower (i.e his wife has passed away). He applied for a 2 room HDB flat with his daughter to form a family unit.

The daughter now wants to get married and apply for a larger flat. Mr. X wishes to live independently. The HDB wants to take back the flat as Mr. X is not able to form a family unit.

They asked him to sell his flat (which cost him $30,000 after grant) and apply for a studio apartment costing $80,000. Mr. X does not have the money to top up. He appealed many times to HDB to remain in his flat, but was declined. Mr. X is still fighting for permission to keep his flat.

What would you do to help Mr. X ,without changing the HDB rules on the family unit? Give your answer here. A prize will be given for an innovative answer.