You could buy every game on this site pretty quickly if you learned to panhandle effectively. Just look dirty, and have a dirty dog that doesn't attack anyone next to you. Grow out your hair and pour fine particles of dirt on your head while shaking it. Make sure your shoes match - bright red Converse won't get the job done. Have a brown coat.
Also, make sure to plant some starter money in your hat/collection bin. If people see that someone else has already given you some coins, they are more likely to do it themselves.