We run a non-profit organization that provides services for families from homeless and battered women's shelters. Part of our programming includes homemade chocolate chip cookies. We have been operating out of borrowed kitchen space for several years, but are now looking to set up our own kitchen and need to purchase an oven. The ability to evenly bake as many cookies as possible at once (a minimum of 100) is very important (all the same kind and size). Any advice on what kind to buy? Remember we are on a non-profit's budget here! Thanks!