You should try to find a babysitting job right inside ur building-that would be so awesome because then you wouldn't need to travel anywhere. I know you said u don't know any of the other people well, but maybe u can ask ur parents to ask around(to be safe also). You can also just slowly build ur collection once a month with ur $20 allowance, that will buy u atleast one good item a month! And if something u want is more like $30, then offer to do something extra around ur house for the extra $10.