Brazil just happens to be one of the best balances between extant infrastructure development, independence and capacity to be workable in that extant development, resource after the fact, safety from political change within & external influence (neighborly war, etc), and fallout arrival/delay.
To get back on subject, I’m guessing the helpful re-seller would also have to have direct access to the gear in order to do all the shipping bits. Just a guess, but it sounds about right re the tone coming from the OP. Point being, any given purely on-line helper is probably a no show for the OP’s design, here. Again, just guessing, but it sounds right. As, I don't think they plan on hanging around for the physical bits involved. Hence the first paragraph's origin....