You don’t NEED a special ‘water bath canner’ IF you have a soup or stock-pot deep enough to hold the jars AND about 1-2 inches of water above them AND space to keep it from boiling over. Just be sure to have a rack of some sort in the bottom to keep the jars off the bottom of the pot to prevent breakage & promote more even heating. It may not hold as many jars, but it works, is perfectly safe, and wastes less energy if you don’t have enough jars to fill a full size canner pot.
“IF you have a soup or stock-pot deep enough to hold the jars AND about 1-2 inches of water above them AND space to keep it from boiling over.”
That’s the problem, I don’t have that. I have one tall pot but it would only hold maybe three pints or quarts, maybe it would hold four but I doubt it. The water bath container with lid and rack/lifter is $19 on Amazon - that is their best seller for a water bath. It’s the pressure cooker that costs a good deal more money.