This takes a bit of work and time. I'm not sure if it saves that much money. But it's fun!
1 cup white flour, 1 cup wheat flour
1/2 tablespoon salt
1 teaspoon baking powder
1/3 cup water (add more if needed)
1 tablespoon milk
4 tablespoons canola oil
First mix dry ingredients and wet ingredients separately.Mix in half the liquid and stir. Mix in the other half and knead into a ball.
Separate into about 8 balls. (I doubled the recipe, that's why there are so many!)
Roll them out as thin as you can get them.
Fry without oil for 30 seconds each side. The less you fry them, the softer they'll be.
To turn them into tostadas, fry them in oil (enough to cover bottom of pan) about 30 seconds to a minute each side.
To turn them into nachos, cut them into 8 parts.
Fry in oil (to cover bottom of pan) about 30 seconds to a minute each side. Sprinkle with salt as you start layering them on a plate. For a healthier version, bake them in a single layer after spraying with oil on both sides (or coating with a pastry brush) for 6-7 minutes.