Purchase one weapon for every region. This is also a requirement for trophy hunts. You should not have any problems having enough money to do so. After reaching a specific upgrade level for a weapon part, you must wait for its delivery. Hunting requires you to arm yourself with two different types of weapons. For your primary weapon, use a long-distance gun with top firepower. The goal is to strike down your target before they get too close. If you need to do a second shot, make sure you have a secondary weapon that can kill your target when it is in close range.