I am in shock.
No really I am absolutely being 100% honest with you.
First aid kit.
Water purification.
Fire starting.
Wood cutting tool/work tool/knife.
Personal shelter tarp and bivvie bag.
Fishing / trapping kit.
Navigation kit.
Renewable light source and emergency light source back up.
Clothing.
Food stuffs.
kelly kettle/cooking equipment and a boil cup/tin.
Anything else you consider you will need such as whistle, mirror, luxury items to help you on your journey...
Its able to be put together in a month at most - If you have the money to buy a 'commercial BOB' you have the money to make a much better and low weight BOB your self.