Got this tip off a cheat site, haven't yet used it myself as i'm not far enough into the game.
When you have territories (sp?) and they start generating money if you go into your house and play the video game then you can walk away from your playstation for as long as you want. Your money from your territories should grow, however your health won't go down due to hunger.
Just thought i would share that, it's always good to know that one if you're short of money, tell me if it works, haven't tried it yet as i said before.