Hello,
Unfortunately, it is not a very important matter in my country (Colombia): people still consider buying huge cars for the city (

), even if only one person is going to be transported in this vehicle, which I think is ridiculous...
This "low cost cars" culture has not reached our country... even the "alternative fuels" are barely sold...
However, in Colombia (more specifically in Bogotá), gas and "eco-diesel" are getting more important than gasoline.
As you're saying, Brasil has worked on alternative fuels since a long time ago, more than any other latinamerican country, so it would be a good option for marketing your vehicle.
Nevertheless, if you come to a very good idea, there's an advantage in Colombia: because there is no culture of "low cost cars", if you introduce your idea here, you won't have a strong competence... think about it!
Good luck!