Place the bacon in a large deep skillet and cook over medium high heat until evenly brown. Drain on paper towels, crumble and set aside. Drain bacon fat from the skillet.
2
Using the same skillet, cook the ground beef and onion over medium heat; stirring until the meat is no longer pink, 5 to 7 minutes. Drain.
3
Transfer the ground beef to a slow cooker. Add the pinto beans, butter beans, baked beans with pork, lima beans, barbecue sauce, ketchup and brown sugar to the the ground beef mixture, stir to combine.
4
Cover and cook for 4 hours on high. Top each serving with crumbled bacon.