Green-field and brown-field investments are two different types of foreign direct investment. Green-field investments occur when a parent company or government begins a new venture by constructing new facilities in a country outside of where the company is headquartered. Brown-field investments occur when an entity purchases an existing facility to begin new production.
BOOT (Built Own Operate and Transfer) has been used throughout Asia. The government open bid for certain infrastructure projects. Private companies bid. Once the contract is granted, the private company uses its own money to build. After completion, private company collects user fees, i.e. bridge or highway tolls. This operation by the privatecompany will last for a set number of years, i.e. 20 or 30 to allow the company to recoup cost plus % profit from the project. At the end of the term, the project transfer ownership to the government. This type of Public Private Partnership allows the country or government to build infrastructure without resorting to tax revenur or put tax burden on people.
I would recommend going to The World Bank or regional development bank especially if inadequate infrastructure is available like power, roads, etc.
John