The jars likely cost more than the volume of produce it could store.

Also - have to arrange logistics for labor, supplies, and a kitchen to do the boiling in. Now that you are making a cooked food product, your kitchen also likely needs a license.

And insurance in case your rushed pickling operation creates any jars that go foul and anyone gets sick.

Also – ew. Not even the destitute want pickled cauliflower.