In a survival setting, the first-aid kit determines how long you will last.
Unless you are McGyver that can spin out crazy contraptions, it is better to be prepared for the worst and pack a first-aid kit.
First-aid kits aren’t cheap because we are talking about life and death here and one wrong material will get you killed. For example, if you go cheap on knives or don’t use the first-aid kit in a long time. Chances are that the cheaper knives will have some rust when an emergency appears and you are risking tetanus infection. Also some substandard knives are also known to break off, which renders them pretty useless.
The tip here is to slowly build up your kit and get really reasonable items for the price.
Here’s a basic breakdown of the composition of a first-aid kit: