First, knowing how much is the yen is compared to that world's money is USELESS, it only matters how much he makes and the costs os living on that world. Second, dafuq uruguayan pesos? LOL
Then for the interesting part, I believe that goblin+goblin makes a hobgoblin, and with those make a bugbear? Gobbos for bugbear easily makes up a very strong army out of hunting weak enemies. Then combining wolves he can probably get a big one to use as mount.