Horses, Cattle, and Pigs.
I don't think it should be taken at face value because those ways could be the main ways to earn money, but it could probably be the least reliable or successful ways. This sentence could just be a lie taken literaly in which has a hidden meaning. This could be a meaning that you might not get, in which will leave you ripped off.
Answer:
cartoon apply to the Nonaggression Pact? The honeymoon phase is the beginning of a new marriage where the couple never fights and they are both happy, the title, "How long will they last" is representing that right now, Germany and the Soviet Union are in a friendship, but how long will they really last?