Capital for eb5 visa

Hi everyone
I hav agricultural land on my name. Want to aply for eb5 visa investing half million. Do i hav to sell the property and show liquid money in bank account to start the process of application? Can i show just the documents needed before approving conditional greencard?
If my visa got rejected how can i get my money back. Plz let me knw as i have to take the decision of applying for eb5 based on this...
Unfortunately, having land would not be enough, you would need a business that actually hires people. If you see my past responses, you will see that I have a eb5 business ready to sell ( I am the owner), its a gas station with property. Let me know if you are still interested.