*Side note: I learned a while back that not everyone knows the dollar store sells fake floral. It might need some extra glue because the flowers like to fall off their stems, and you'll likely want to fill out your arrangement with some higher quality fake flowers, but for bulk fake floral, the price can't be beat.
I was lucky when working on The Suicide at Roosevelt University, that there was already a stock of flowers and greenery to pull from, but I still needed six wreaths to create my arrangements. The foam wreath forms at the craft store were small and expensive. But these basic wire boxwood wreath forms were cheap and just the right size.