Alright this one was kind of annoying to figure out because there is a lot of wrong info on google. But once you know what to do it's very easy to farm. Most of what google says is that you just need to not get seen by anyone. But that isn't true. You also need to have 6+ items in your inventory. I always had around 8. Then you can load up the first neighborhood Greenview Street and just farm the 109 and 110 houses and then run out of bounds. 111 is fine too but it's a little more annoying to get into and you only need 6 or 7 items. It also has someone who comes and goes to it. I only did 109 and 110 and I always left with like 8 items. You don't need your car, Just run across the line. Rinse and repeat. I don't believe it matters if a pedestrian turns yellow. But if they turn red, although I still don't know if it messes you up, I would assume it does and you need to start over on your run.