This was a fun project. Ever though about reusing odd findings for your new cards?
Here I used a old Monopoly game set to create some new pieces.
Used a Die Cutter to cut out a tag from the monopoly board. Can still write a special message on the backside which is blank.
In this case instead of using expensive paper I cut out a flower from Monopoly Community Chest cards, and instead of little flower stamens or a bead, I used the Monopoly House.