Consultation for construction and real estate experts

I have a consultation and the consultant is trustworthy I hope you guide me with honesty and sincerity I have a land in Mecca, its area is 600 m Residential, worth 500 thousand, with electronic deed I want to build on it for residence, I want to live there But my financial ability does not allow What is the way.. Should I divide it into two plots 300 / 300 m Sell one and build two floors on the other Is there a bank that can build it for me, make it 4 apartments, and take installments for two apartments? Can anyone help me? How can I build it and live in it