Not sure if you have them available or they are out of the way, but local farmer markets pricing is usually cheaper for organic. If you develop a relationship with them after a few visits they usually hook you up with better pricing or free produce.
Urban garden, dude. You'd be amazed at what you can produce in a small space with raised beds and climbing plants. I am still eating last year's garden from the freezer while harvesting over winter and early spring crops. Ever eat a pea pod right off the plant? Almost like candy.