Canned a ton at one time when the MIL was alive but not now ( nothing like Kevin BUT a lot) just beets and pickles normally now since my girls won't eat that stuff plus that is far from cheap any more Like 75 bucks last year to make my beets ( my beets) since I had to buy bottles etc . The bottles seem to vanish no matter how many one has plus now being diabetic that canning has to stop from the sugar

Have a brand new cabelas dehydrator in the garage for about 4 years now never out of the box just don;t seem to get around to trying it
12x20 will give you a nice crop if laid out right and won't kill you taking care of it Most try to focus on the veggies that cost more like tomatoes etc not the cheap stuff when space is limited
We blanch and freeze with the vacuum sealer also but after a few months IMO just don't taste the same and a lot gets tossed out of the freezer
Weeding and watering are every month not just dry ones and here i pay for water and with garden and greenhouse 400 / 500 bucks a bill is normal during those months which is more cost many don't consider to be added to the saving ones thinks they are getting Most days the drippers are running 8-12 hours steady and that adds up when on a meter
Not trying to be negative just honest hobby gardens great and save some cash if managed right and get the taste you cannot but trying to save your total or most costs of veggies for the year expensive to do and take s a ton of your time and savings if any are not what some think
Like I put 100's of pounds of potatoes away wife says this week those potatoes left are getting full of sprouts and soft and might have a week or so left to use for eating so I will be buying potatoes soon and I planted 300 plants last year over 300 feet and the straw alone to cover them to keep the weeds down was 120 bucks and the seed potatoes with shipping from NB ( could not get any pei last year due to that wart) over 200 bucks add water, my time, fertilizer ( three times), compost etc Expensive potatoes to grow vs buying IMO but the taste is worth it which is why I do it not to save any money or my bud who lost all of his due to a late blight had 500 plants in
Gardening is tough and expensive to do I find here lately as our climate has changed and we have not figured it out yet or at least I have not seeing bugs and weeds I have never seen before also that don't respond to normal treatments either
For me it's not about saving money but about enjoying time spent outdoors and watching things grow and producing better tasting produce than you can get from your local grocery store.
Maybe some gardeners save money, but I'm not one of them.