I've canned 26 quarts of tomatoes so far. I plan for a quart a week for spaghetti sauce. I've found I really like my rice cooked in the Instant Pot with a quart of (undrained) tomatoes. I use tomatoes when I make stew or soup. There were about 24(?) quarts left from last year. Why so many? Dunno. We may have skipped a few weeks of spaghetti sauce (or had leftover), but not a lot.
I plan to can about 25-30 more quarts, if I get enough tomatoes. Still have to have tomatoes to make hubby's salsa. I'll make green tomato salsa for me once we're done with the ripe tomato stuff.
Quart jars of tomatoes don't cost me much. I have the seeds, saved from my tomatoes. I make my own potting soil. I have the pots. I started these plants, I didn't buy them. I did buy some Tomato-Tone and gypsum to combat blossom end rot, and it worked wonderfully. I easily have enough for next year. I had to buy canning jar lids, but have the jars and rings. Had to pay for the electricity for the stove when I can, plus the salt and the lemon juice.
They cost my time, and it's something I enjoy doing.
Remember when you were a little kid and your mom said, "Don't put that in your mouth! You don't know where it's been!" Well, with these tomatoes, I know exactly where they've been.