Well powered with a suitable work force? Where would you suggest? Here's a map: Apuí - Google Maps.html
If I was building a large, hi-tech processing facility that was going to be producing tonnes of gold bullion every month I'd wanna go a bit further than Apui. Security is a major concern out the back of the Amazon.
While the gold is locked up in the rock it's worth nothing to anyone but BBX, and as I said, the high grade makes each tonne extremely valuable so transport costs are negligible: "at 300g/t we could ship it to China for processing. "