OP asking for survival tips. Avoiding the crisis is best, sure. But if that doesn't work right off, keeping body and soul together needs food. Studied this a bit when I thought we might be looking at an economic meltdown on a large scale. YMMV, this is result of reading and practicing from comfort.
Most canned foods are very low on the calories per dollar scale. On the other hand they need no refrigeration and most can be safely eaten without preparation, being already fully cooked.
Sites like Survivalblog are a wealth of staying alive info. There are many sites about surviving homelessness too.
Find a LDS cannery in your area and ask if they sell to the public. Most will. A six pack of #10 can filled with oats or pasta or dry milk goes a long way for very little coin. They have a pragmatic mission to help folks before a crisis.
Get a wide-mouthed thermos bottle or two. In goes a half cup of oats, a pinch of salt, dab of butter if you have it. Flavor to taste and ability. Add a cup of boiling water, seal and let sit 5-10 minutes. Ta-da, a hearty breakfast for a few cents. Thank Kurt Saxon, regardless of his politics.
If you still have a roof and electrical power, consider a thrift-store bread machine. A few practice runs with some recipes off the 'net or from the library. '5 minute a day artisan bread' works well. A rice cooker is another great tool for keeping well fed on the cheap. Add a wok and you can work up a near infinite variety of stir-fry tasties.
Look at 'Eternal Soup' for how some of our ancestors made safe use of all nutritional calories that came their way in trying times.
If you are looking at longer term low-cost food intake, remember complete proteins and micronutrients. Vitamins. We can get by for quite a while on body reserves but the symptoms of deficiency won't help an already tough situation. Healing slower, getting sick more easily, worsened depression, insomnia, and the ever-popular teeth falling out. Sprouting beans, wheat berries, getting a few ounces of ascorbic acid for doctoring up the bread dough... do a bit of homework.
Keep a healthy mindset.
Blessings to you and yours.