I'd never want something so smelly and gross in my house. I think they're cute to look at and all.... but I'd never want one.... 
I'd never do it.... the smell alone is terrible.... I couldn't have something that required that much bathing and attention in my home. Plus, their bathroom.... omg... when they go.... omg.... it's.... well it's a disaster....
Maybe she'll stop wanting one eventually....
They're a little more expensive, but I don't believe they're like TERRIBLE pricey or anything like that. :P Worth a check into that's for sure. :P Or there's always those hairless kitties.... Some of them are kind of cute in their own way.... I almost think for me it's "they're so ugly they're cute" kind of things... Just like pugs... 
My friends sister had a hairless cat. It was cute. Her bf was very allergic.