Thrift stores are definitely the best ideas. I don't know if you guys have Value Village there but you can get anything - boots, shoes, jackets, pants, shirts, dresses, whatever - and all for super low prices. You could get an entirely new wardrobe for anywhere between 30-50 bucks if you wanted to. Here in Canada they're a chain and they have them everywhere. They're like thrift superstores and sell all kinds of housewares and furniture as well, and are notorious for being a Halloween costume epicentre.