It is so much cheaper to grow your own food.
Just to give an example, a head of cauliflower costs $2.40 more or less.
You can get a package of cauliflower seeds for $1.44
A package of seeds will have maybe 50 seeds, so you can grow 50 cauliflowers. You can even sell some.
And shelf like is a good 3 years so you have cauliflower for 3 years.
I only gave the cauliflower example, just to give an idea.
Think about it..