Absolutely not.
Step 1. Locate a pair of basic, 5 pocket jeans, either from your own closet or thrifted. Perfect use of thrifted jeans!
Step 2. Put on your jeans. Using chalk or pins, mark how long your want your jeans to be.
Step 3. Take off your jeans. Lay flat. Add about 3-4 inches to your mark (this will accomodate the roll at the bottom). Whack off the bottom of the jeans.
(Why cut them? Why not just roll them from the bottom? This makes for a really bulky roll. Cutting them off makes a smaller, cuter cuff.)
Step 4. Zig zag around to finish.
Step 7. Enjoy, smug in the knowledge that you got the look without buying new jeans. You have beat the system. Congrats!