(spoilers, I highly recommend Arrested Development - there's only a few seasons and it's very funny. So if you want to see the payoff of the joke live and unspoiled, skip my comment and watch the show)
It's a running joke from Arrested Development - a comedy about a family running a property empire that was heavily involved on fraud and in the process of collapsing. The (jailed) patriarch of the family - George Bluth - made some seemingly off-hand references to a frozen banana stand the family still operated - saying "There's always money in the banana stand". These were misunderstood as meaning "The banana stand still makes some money" and dismissed, when they were meant to mean "I have hidden $250,000 in the walls of the banana stand"
The show’s main protagonist, Michael, burns down the banana stand as a symbol of no longer putting up with his father’s influence. His father then told him of the cash in the walls of the banana stand.
It's a running joke from Arrested Development - a comedy about a family running a property empire that was heavily involved on fraud and in the process of collapsing. The (jailed) patriarch of the family - George Bluth - made some seemingly off-hand references to a frozen banana stand the family still operated - saying "There's always money in the banana stand". These were misunderstood as meaning "The banana stand still makes some money" and dismissed, when they were meant to mean "I have hidden $250,000 in the walls of the banana stand"