This is a walkthrough for the Treasure Hunt, The Man and the Mongoose. Details on how to find Alvaro’s stash.
A man having a feud with a mongoose? I have to check this out.
Find Alvaro’s stash
Head southwest of Paraiso Lagoon to reach Siniestra, then read the note attached to the post to begin this quest. Now shoot the lock on the gate and enter the fenced off area on the right, then go over to the shed and collect the key which is sitting on the wall.
Open the shed and quickly defeat the mongoose, then walk over to it and collect the Stash Key. Finally, enter the house in the fenced off area and open up the stash to bring this hunt to a close.