I know you probably keep getting this type of quesitons, but have you looked into other countries to create a gateway in South America?
Even though Chile doesn't have the fastest connections, the net is usually estable here.
Not sure how it is in other countries, maybe Equator or Peru might also be other alternatives.
As an example, I get around 100-110 ms from the Sao Paulo gateway on "good days" (sometimes I get up to 150), and about 180-190 from texas and Washington gets me about 10 higher than texas on average, but a lot of the time the texas one or the Washington one are much more stable and playable for me anyway.
I'm just wondering if it's a problem of player base (perhaps there's too few in the west coast of SA to justify the gateway here) or maybe resources (perhaps Chile or other countries are more expensive than Brazil) or maybe there's another reason (logistics, contacts, time constraints, etc).