Halloween falls on the same day every year, October 31. Costumes can be quite expensive until that date, but starting in November, the prices significantly drop. That's the best time to buy a Purim costume with a hana'ha. Purim usually happens in March, so it leaves you plenty of time to get your costume shipped to Israel or wherever you will be celebrating this year!
Hopefully, we will be able to do it all together! Happy shopping!