i would think that BBQ is hard to do in MHK. BBQ isn't cook to order. when you cook it, you generally have to cook a lot of it. i would assume that outside of gamedays, there's a lot of waste which means your margins have to be big and your prices higher than you want, or you're selling inferior food that has been sitting around. not food that will make you sick, just food that is overcooked because it's been waiting to sell.
the reason famous daves does well is because they cook their food in a factory and ship it to their stores packaged to handle the transit time and then reheat it at the restaurant.