Settler's Slow Cooked "Baked" Beans

1/2 lb ground beef
1 small onion, chopped
1/4 cup brown sugar
1/4 cup ketchup
1/4 cup barbecue sauce
2 tablespoons prepared mustard
2 tablespoons molasses
1/2 teaspoon chili powder
1 teaspoon salt
1/4 teaspoon pepper
1 can red kidney beans, drained
1 can butter beans, drained
1 can pork and beans

Place ground beef and onion in your slow cooker. (May be browned first, if desired) Add remaining ingredients except beans. Mix beans together and pour into your slow cooker. Cover and cook on low for 6 to 8 hours.