As an exercise; what kit would you build instead for $100? 
Not sure about price but here we go:  
- Ritter PSP 
- Heatsheets 2 person
- Backup knife
- Mini Bic with the button secured by a cable tie
- Backup flashlight
- a small number of chlorine dioxide tablets
- 1 liter water bag with some string to carry it
This all fits in a pouch a little larger than two packs of cards.  I put this together before Doug came out with the PSP+ (which has a water bag, chlorine dioxide tablets, and backup knife).  
I do not pretend it is complete or carries things needed for every situation. I have a PSP that was dedicated to using and testing, and I’ve proven that I can operate the cable-tie-secured-Mini-Bic with either hand.  It’s probably time to lubricate the knife and change the battery in the flashlight.