I made this recipe today. http://wowsroses.blogspot.com/2008/02/crockpot-chicken-enchiladas.html
To make it a really cheap meal use Chicken Thighs instead of Breasts. I use Chicken thighs in the crockpot instead of breasts in the crockpot for things that call for shredded chicken breast, like chicken tacos.
To make easy shredded chicken tacos, use a pack of chicken thighs, a packet of taco seasoning and a little bit of water. Cook on low for 8 hours or high for 4 hours in the crockpot. It will smell heavenly. Use Flour tortillas and cheese and what ever toppings your family likes.