You can use this trick with new profiles to earn yourself unlimited money for the life of that profile. Start the game by purchasing an inexpensive house, a bed, a refrigerator, and a toilet. Next, buy 100 three-star catfish at the store, then return home. Sleep overnight, then return to the store to sell the catfish for around $17,000 apiece. From that point onward, you'll never run out of money while using that profile.