Drain and rinse the soaked pinto beans. Set aside.

In a large pot, cook the chopped bacon over medium heat until crispy. Remove and set aside, leaving the drippings in the pot.

In the same pot, add the chopped onion and cook until translucent, about 5 minutes. Add minced garlic and cook for an additional minute.

Add the soaked beans, ground beef (if using), chili powder, cumin, smoked paprika, water, barbecue sauce, and brown sugar to the pot. Stir well.

Bring the mixture to a boil, then reduce heat to low. Cover and simmer for about 60 minutes, or until the beans are tender.

Stir in the cooked bacon before serving. Adjust seasoning if necessary. Serve warm.