Store bought tomatoes seem to taste more fucking bland every year. Like I have to spend $6 per small bag to get "gourmet" tomatoes to even taste like a tomato. It's actually infuriating. I grow tomatoes now literally not to save money but just because grocery store tomatoes (at least in my area) are trash.
Store tomatoes are not tomatoes. Unless you're buying somewhere legit and expensive af, the tomatoes you see in stores are picked green and gassed to turn red. They are dog shit. Probably worse, actually.
Seek out local farms near you and get the good shit (and often cheaper than places like whole foods).
Tomatoes are one thing I never buy in a store, except sauce/canned tomatoes, as those products are derived from ripe tomatoes.
Depends on where you live. If you live in Italy, you can just throw random shit around your house and a couple of months later you will crap loads of free food!
We had 1/2 acre and planted a bunch of things, ate for free. Water was from a well so not even a water bill. Best tasting veg ever. Potatoes though, those are hard labour.