You can propagate those to an incredible extent. Here's how I do it. Dig them up. Spray all the dirt off or as much as possible. then cut them into 3-4 inch diameter groups. Get some good shrub potting nursery mix, some 1 gallon pots and plant them up. You can use the ones you need and sell the rest. I do this with overgrown daylilies as well.
Everyday you wake up you have been given 24 hours. What you do with those hours determines how rich you will become. The rich work the hours you don't see.
Great Book: "Think and Grow Rich"