After completing the first quest in the Ghale Homestead and unlocking it, you can purchase a farm upgrade for a large amount of rupees. Buy it, then unlock the first level perk on the Elephant path to get double ingredients every time you harvest a plant. Once the garden appears, pick all the plants, then fast travel to an outpost to sell the plants. Fast travel back to the homestead, and the garden will be fully restocked with valuable plants. Repeat this process as many times as desired.

During the final mission, before entering the palace to confront Pagan Min, equip the rocket launcher. You can find multiple rocket launchers during the final battle in the fortress. When Ajay Ghale points his pistol at Pagan Min's head, do not shoot. You will then fly in a helicopter to a burial site with Pagan Min, and Ajay will lay the ashes of his mother. After exiting the tomb, Pagan Min will escape in his helicopter. Once you are back in control, quickly shoot down the helicopter with the rocket launcher. It will crash into the ground below. Travel down the mountain, and destroy the wooden doors with an explosive. You will find the crash site up the path, and Pagan Min's body nearby. Loot his body to get Pagan Min's Golden Pen (worth 300,000 rupees), Lapel Pin #2 (worth 350,000 rupees), and 250,000 rupees. Then, fast travel to anywhere nearby, and return to his body to be able to loot him again. All items respawn after each fast travel. Repeat this process as many times as desired. You can easily get 1,800,000 rupees approximately every ten minutes. Note: This glitch was performed on an unpatched version of the game.