I don't believe NaOH has the reducing power to form free Zn. Sodium is more electropositive than zinc, and will not exchange easily. Certainly, nothing useful will happen in aqueous solution. If you really want to make your own zinc, you might try roasting it to the oxide, and maybe reducing it to Zn with carbon, under say, borate salts as a flux. I used to play with US pennies in that fashion, they are simply a thin plating of copper over zinc. But you're not likely to save money with these machinations. Zinc and other such reactive metals are usually produced electrolytically, from the melt, hence the price.