Do you have any community supported agriculture farms (CSA) in your area? That might be another way of getting affordable veggies as well.
That's exactly what I was going to ask...my husband & I live & work on an organic farm that he grew up on, and our farm is a CSA. CSAs generally require an upfront investment, since most of them use a subscription program in which you purchase a seasonal "share" and pick up your share of produce weekly. It's not the grocery-shopping method of picking and choosing particular veggies/fruits (though sometimes there are some choices available - i.e., one bunch of chard or one bunch of kale), and many CSA farms offer u-pick options as well, in which you get to go out and pick a pint's worth of strawberries, etc. (I understand that would be problematic because of your health).
Anyhoo, I'm personally a big fan of CSAs - they don't work for everyone, but if you're looking for fresh, seasonal produce, they're a great option. It requires a commitment to the farm and to the notion of eating seasonal food, which can be an adjustment for many (i.e., depending on where you live, the beginning of the summer season usually has a lot of greens and not many of the tastier veggies that come in the warmer weather).