A backyard business started as a side hustle has reportedly grown into a successful venture, with one such business hitting mid-six figures a month and being sold in Costco. However, it is unclear if this specific business is related to barbecue or another endeavor, as reports of various businesses and topics are intertwined. The success of backyard businesses and side hustles is a common theme, with some achieving significant financial gains and others facing challenges such as potential smoking bans.