Well, a really cheap way would be to buy a pink prom/regular dress from goodwill... or goodwill, as is store... and alter it. You could even easily use a pink T-shirt and a pink skirt, if your creative enough. Also some kind of netting to make a petticoat; that skirt WILL NOT stay up like that without one on. The rest can be make out of scraps from altering. That's a cheap cosplay to make; hell, I could probably make it for you for fifty or something. XD Well, not including the wig. As for that, cheapest option is to buy a plain wig. Preferably straight, and style it. Lotsa hairspray and curlers. Not hot ones, because if left in and hairsprayed enough, even cold, they will turn into curls. It'll just take a while. ^^ hot can ruin wigs easily.