Best options to rotate 5m investment

I have 6 million investment and i left my recent job and wanted to establish my own business that needs 2.5 million for period of 1.5 to 2 years.

I want to invest my money to gain at-least my 2.5 million in 2 years to start with 5 million investment in lahore.

What are best options to invest? I will really appreciate your replies. I currently go through and found following options

1. Dha phase 9 prism j block - 5 marla upper portion with one 5 marla file in lake city m7c/m7d

2. Dha phase 9 prism r block - 5 marla with one 5 marla file in lake city m7c/m7d

3. Bahria orchard (which block is best?) with one 5 marla file in lake city m7c/m7d

4. Dha multan file with one 5 marla file in lake city m7c/m7d

5. Any other options