I would say at least as much time as it takes to get an appointment with the real Santa Claus (not with one of those many actors, malls & shops everywhere are using to lie to kids) times the time it would take to tame and then to train the Easter Bunny, persuading it to lay actual eggs instead of chocolate ones.

But it could be done much faster provided one can somehow get Rumpelstiltskin to transform gold into straw. Which is rather difficult.