You have a lead arranger or lender, who then syndicates the borrowing. You go on a series of road shows to promote funding into the project. Any negative news about your country in the global press, the deal will fail.
You will have a timeline but all the steps will take however long they want. Average time 5-10yrs. Changes in govt, economic conditions etc can add another 5yrs.
I have a client who is 17yrs and $3m into a project!