OK, keep the "hustle," but skip the yard work. If cashflow is your goal, focus on any special marketable education or skills you have. Graphic design? Programming?

If you don't have any particular educational or professional background, I'd recommend sales. If you're good at that, you can always make money. Car lots are almost always hiring sales people. The sales world is pretty aggressive and very much "I don't care what you did last month, how have you made me money lately?" But if you can handle it and be as aggressive as they are, there's a lot of up-side.