Don´t forget to grow green beans! They´re about the best easiest crop I've found, especially the little bush ones. Pole ones produce more per plant for longer but require more thought if you plant a lot. I grow lotsa other stuff too, mostly for home use, but for organic market garden time green beans, lettuce and cherry tomatoes (plum sized) are where its at! Sell them with home baked bread and you've got the start of a rockin' little stand. Green bush beans are the easiest most reliable commercial crop at the small scale. Super easy to plant and grow, almost no problems, no damage during transport and storage, they weigh a lot compared to other bean crops and require no shelling and usually go for a good price. Everybody likes them.
Down here in Central America, we grow a lot of beans. Like a whole hillside at a time and people who do that don´t buy beans for the whole year. Excellent staple crop, cuz that's real protein and calories, not just a salad or stir fry! To start, you could plant one good wide row with some little bush beans of some sort, or you could do the traditional "three sisters garden" that the Native Americans liked so much, with the corn growing tall, squash vining low covering weeds and conserving water, and pole beans vining up the corn. Growing this trio together yields a heck of a lot more food per area than planting them alone. Get your corn started and then come through when its a few inches high, maybe hoe it up some to get the little weeds, and plant 2-4 pole beans around each corn stalk and sporadically plant squash seeds here and there. You´ll have a heck of a lot of food with very little maintenance.
Harvest some of your beans fresh after they get color while the pods are still green or turning yellow, a very tasty treat. For storage, (assuming you plant a lot) let them dry in the summer sun until the pods are starting to turn brittle, but don't wait too long or they'll crack open while harvesting and it's a pain in the butt. Let them all dry harvested in the sun the rest of the way, and then on a hot sunny day put them on a big tarp and beat them with big stick real good! Two big sticks, real good! Great way to take out aggressions. all the pods pop open and you move all the trash off the top and you´ll have a lot of beans on the tarp below. When you plant a lot of beans shelling them by hand isn't feasible, it'd be like shelling wheat. Sift the fine trash out by pouring them from one bucket into another in the wind and it'll all get blown away. It might sound like a lot of work, but it's not when taken in the perspective that with just a few days work you can grow a very significant portion of your family's diet for the year. I dunno if it works out monetarily cheaper than buying your beans in the stores up there, down here it often doesn't but it's nice to eat your own, and if you think about food security and self sufficiency and the environmental effects of industrial agriculture then it makes it worth it to me at least. Vegetable gardens are great but it's important to remember your staple crops or you're gonna be hungry. Grow some potatoes, too!
PS - you probably already know this, because everybody already knows this, but cherry type tomatoes with the great big vining habits (monster indeterminate) have way less problems with critters and disease than regular tomatoes. If you can find a seed for like a plum sized cherry tomato, those are the best I've found to grow. It becomes a big issue down here in the tropics but I know blight fungus exists up there too. This applies regardless of whether or not you're strictly organic, because if your tomatoes get sick you don't want to be out there spraying with gross pesticides and fungicides any more than you have to.
Good luck!