Same type of environment here. Two years ago I had four different crops of beans; bush. I've pulled tomatoes in December. I didn't do anything this year because, largely, I had other projects. Then...still got about 2 lbs of Okra from last year in the freezer. And beans, and peas.
A lot of what you mention here I can grab, pretty cheaply, and the fair grounds. I know. Sounds crazy, right? The hispanics have more than 20K sq ft of fresh, every Sat and Sun. Literally, refrigerated truck running just outside their "location." And it's HUGE! It's local. A guy I buy Blueberry Jam from at the Summerville Farmer's market grows a lot of their stuff. (Damn good jam. I've got his Strawberry and Raspberry in the fridge.)
One thing I haven't seen a big jump in price is tomatoes. I use Romas a lot. Not a sandwich tomato, or one I'd put on a burger, but a lot in salads and recipes. They are .21 at Walmart right now. Five for a buck works for me.
I DO miss the "Tiny Tom" tomato plants I've had the last few years. A lot of that has to do with working in the yard and pulling a dozen to munch on real quick. Like freakin' candy. IF you've never grown one. DO SO!
Another little story...
One of my neighbors garden has been torn up this season. I told him, "you will need to sprinkle Fox urine around to keep the wild life out." He didn't. Neither did they. It's a lesson I learned years ago when I looked out the window and saw a BIG ASS rat eating my tomatoes. On its hind legs; just munching. It came from an undeveloped area about 100 yards from here. Cows, still there. The guy sells 12-14 a year and doesn't buy meat at the store. (He's also a weird SOB.)
Enough of my rant...now I'm hungry.