Work up the Business Plan.....determine the need and then define the aircraft that fits the need and can be bought and operated at the rates/demand you see existing for that particular area.
You will have to factor in all the costs, licenses, local "fees" and everything else that goes along with operating aircraft in that part of the World.
Finding the aircraft is not hard....paying for them to begin with is not the problem....but keeping them "paid" for long term is the rub.
Good Luck!