I really try to keep expenses related to ballet (and other silly and/or stupid things like paper doll collecting) limited to what I can afford to spend out of my own private bank account, which is filled via Etsy and Ebay sales. It works out pretty well, at least for the majority of the year. And then all of a sudden I need another pair of pointe shoes and it all goes to hell. Thankfully my dear husband is the type that doesn't require asking permission to buy things. Not that I would hang out with that kind of guy, anyway. It always amazed me when I worked retail and would ring up a woman's purchases and she looked at me nervously and declared "my husband is going to kill me!" Really? Is your husband a jerk-face control freak or are you just really really bad at understanding budgets? Because for realios, guys. It's just weird.
Also: buying new pointe shoes all the bloody time? Pretty unappealing. Get with the program, ballet! Embrace plastics!