A great way to reduce costs; use flank or round steak to still get that steak flavor without the price of a more expensive cut of meat.
If desired, make Deluxe Fajitas!! After 8 hours of cooking, add the bell peppers along with 2 cups fresh sliced mushrooms and 1/2 to 1 pound cooked, devienned, tail off thawed shrimp. You might also want to add a little taco sauce or salsa to add to the liquid in the slow cooker. After adding extra ingredients, cover and cook on high 30-40 minutes.
Place steak in slow cooker. In bowl, combine tomatoes, garlic, jalapenos, cilantro, chili powder, and cumin, pour over beef. Cover and cook on low 8 hours or high 4 hours. Stir in peppers, cover and cook on high 20-25 minutes.
Serve in tortillas with cheese, sour cream, salsa, and guacamole.