Fat CJ is the funniest option, especially if you put him in that Uncle Phil jumpsuit you can find at some clothes shop
That reminds me, this is the best thing to do the second you start the game. If you really want to make things easy, use the money you make from Firefighter and buy the house in the north side of the city, near the park with the pond. Save the game and then drive to the horse betting shop just to the west, it's like a straight shot, and bet all your money on the horse with the shittiest odds of winning. If you win, your money gets multiplied by x12 times or something, if you lose just reload the save and try again. After winning, go save and repeat until you have a gazillion dollars.