So with those thoughts, it almost seems prudent to just buy 1k in freeze dried food ( http://www.ebay.com/itm/1-YEAR-MOUNTAIN-HOUSE-FOOD-ENTREES-R...? ) which can last you a year if needed. The only other things you really need is water (tons of purification options out there).
The next steps are protection and information. You can get a firearm for about 500$ with ample ammo and a world radio with a solar charger for 100$.