How can I grow an organic vegetable garden in a town with tons of squirrels and rabbits affordably?

Given those limitations I would say the best chance to get something would be to plant in containers. Perhaps you could use some of the old methods like putting human hair in surrounding areas or some of the bad smelling things you can purchase. Some of those only last a short time or you have to renew them regularly but you might get a little out of your garden.

One option you might could try is an electric wire run around your garden area. Don't know if that classifies as a wire surrounding or not. I used to run a wire about 6 inches from the ground to help deter critters.

That might be workable in your situation. More.

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