You know, my girls are "fashion plates", too. "Juicy", "Abercrombie" and even "Dolce & Gabbana" are names well known in my daughters' closets.
but I doubt I ever bought 30 outfits for either one of them, with matching purses, at one time. especially when they were preschoolers and they'd be outgrowing the clothes within a season or two. I didn't mind buying things for the older one because I knew I'd be passing them down to the younger one.
If you dress her like this now, by the time she's 12 she'll bankrupt you.