Argentina offers a wide range of locations and tons of state-of-the art film and video equipment, but for you to take advantage of this in a cost-effective way, the key is giving your local fixer the most time possible. For example, there are tons of Sony Z-1 cameras in the market place and can be rented for a low price (as well as other cameras such as the Sony XDcam, Red 1, etc) BUT as there are so many productions going on they need to be secured well in advance to get a good price.
By extention, the same goes for setting up interviews. Argentines put a lot of empahsis on personal connections and contacts. If the local fixer can visit the interviewee a few times before the shoot, build trust and talk about the project, the subject will be more willing to participate than someone calling a day before and promising foreign TV exposure.