I have frozen raw dough (wrapped excessively with plastic wrap) and fully decorated cookies (in heat-sealed bags lying in a single layer on a covered tray) with great success. I haven’t ever tried freezing undecorated, baked cookies, but I don’t see why you couldn’t. I just wouldn’t advise freezing and defrosting multiple times once the cookie is baked.
225 cookies is a huge order by my standards! I only made an order that large once (when I was working at a bakery and my boss signed me up before asking me how doable it was.) We didn’t have a freezer at the bakery, and by the end I thought my hands were going to fall off and my back would never straighten. Never again! Once I transitioned to a CFO, the freezer was my best friend. Freezing the decorated cookies allowed me to start a big project earlier (and gave me the peace of mind to know everything was going according to plan while I still had time to make adjustments.) I never noticed any difference in taste or texture.