So I pulled it off.. I thought the practice cake I made for my daughter was mediocre at best, but was terribly pleased with how the final cake turned out.
She loved it,
I stuck with pink, purple and white...made the sugar cookie "1" a bit smaller and thus lighter..and sifted the powdered sugar so my buttercream icing was not grainy.

I might try to offer to make similar cakes for friends...just for a gift, not for money, it's fun to bake. And did I mention how yummy the icing and cakes are??