This is kind of a neat question. At first I thought “I’m doomed.” But after thinking about it a bit, I’m probably not so doomed. I think it mostly depends on whether I have to defend against gangs of roving marauders.
If not, I’m good to go. We keep a case of bottled water in the back of the car. I collect rain water during the winter rainy season for use on some of my houseplants, but I could boil it. I’ve got plenty of rice & pasta & beans. If I took all the meat out of my freezer right now made it into jerky, I’d have meat for at least a month or so, maybe longer.
There’s a fresh water pond within walking distance. First thing would be to use the remaining gas in the car to go fill as many containers with pond water as possible. Later, I’d have to walk, but if it were life or death, I could do that.
I garden, and I’ve got seeds for various things, so I’d have to dig a much larger garden. But in the summer we get no rain so I’m kinda screwed vegetable-wise. Over the winter, I could grow corn, beans, peas, lettuce, tomatoes, onions, garlic, various herbs, etc. I have a lemon tree which doesn’t require watering, and it produces year-round. Yah! No scurvy!
I live by the ocean. I don’t own a gun, but I could probably figure out how to fish, or kill some of those sea lions. We’ve also got lots of deer in the area. I’ve got a bunch of pigeons which are fairly tame around me. I could probably catch some. Long term, I could probably grow enough corn & peas to feed pigeons and raise them as squabs.
There are plenty of trees around I can chop down and dry for firewood.
I think I’m going to be ok for awhile. In fact, this almost sounds kinda fun.