As for an Iris addiction I can afford it. I still have plenty of space in the garden and in Hungary, my second country now, there are quite in fashion so they are easy to find and cheap (I think about 1 and 3 USD the piece- 1 big or 2 smaller rizhoma). Everyone has them in my little Hungarian village, but I think I have the highest count of colors.
The Iris cultivators have about 1000 colors from different species to offer so there is plenty to choose from.