The government advises us all to have three days of supplies, so that we can be self sustaining until the cavalry arrives. From my personal experiences during my responses to various disasters, I can tell you that three days is a minimum. If you are further away from a distribution point than average, it may be more like 4 or 5 days. More if the disaster is more serious.
So, I have put together a bunch of supplies to get me through a disaster. Here is what I have come up with:
Food: I have 8 cases of MREs, and 2 cases of Mountain House freeze dried meals. I also have 3 cases of freeze dried meats and eggs. Round that out with a couple of cases of canned goods (tuna, soup, veggies) and I have enough non perishable food for 172 people meals. That is enough food for 6 people for 9 days. Two weeks if I stretch it.
Food prep: I have propane cooking equipment and enough propane to cook 3 meals a day for a week.
Shelter: Other than the house, I have 3 two man tents, and tarps to make more lean-tos.
Communications: In addition to cell phones, I have 4 FRS radios and 2 HAM radios in the 2 meter band.
Power: I need to work on this. I am thinking about solar chargers for the radios and flashlight batteries. I don't need to run the whole house just yet.
Water: I have 30 gallons (at one gallon per person/day, this will last 6 people for 5 days) of water containers, and we can and will fill 2 bathtubs for non drinking water. We can boil that water for cooking if needed.
I have ample firearms for security, and plenty of ammo.
There are also medical supplies, lights, and other supplies.
Even though there are only two of us here, I have enough to supply 6 people for two weeks. Longer if I want to cut it down to subsistence rations. Living in hurricane country, it is just prudent.