One of the easiest, and most economical, things is to cook a whole chicken in a slow cooker. There really isn't a fancy recipe. Buy a whole chicken, add the seasoning of your choice, about half a cup of stock/broth, plop the top on and away you go. 8 hours on low will produce a juicy chicken that falls apart.
My favorite seasoning is from Costco. It's an organic no-salt seasoning. It has a bunch of different spices in it and works in everything. I just sprinkle some of that on top. If you don't have a Costco nearby or don't want to get a membership, you can order it on Amazon as well.
You can serve the chicken for dinner, or I use it for various meals. It works perfect on salads, mixed with rice and vegetables, or one of my favorites, a Moroccan Couscous Salad. I've changed up the ingredients using whatever happens to be in the pantry. I throw in chicken breasts and it makes a full meal.
You can use the chicken in soup, sandwiches, kids meals. All kinds of things.
Experiment with different seasonings and see what you like.