Purchasing survival gear is a necessary part of the prepping process but it should not be done to the exclusion of food, water, and medical supplies. The exception to this rule is water purification and fire-making tools both of which can be acquired for very little cost. For example, consider pool shock for water treatment plus a magnesium fire tool and dryer lint for fire-making.
With this you can can fruits, veggies and even meats. You can do this without the salt or other preservatives and for meats, eating dried or jerked meat gets old fast when you have to eat it instead of it being a snack. The high temp of the pressure canner kills the bacteria that spoils food so it lasts for years. You can make your favorite chicken and beef soups with al the veggies, pasta or potatoes in them.
Freeze-dried food is nothing new. As early as the 13th century, the ancient Quechua and Aymara people of Bolivia and Peru pioneered a form of the process by exposing potatoes to the freezing temperatures of the Andes overnight, then drying them in the sun. In 1937, Nestlé used industrial technology to create the world’s first freeze-dried coffee, and in the 60s and 70s, the US military shipped freeze-dried food rations to the troops in Vietnam.