The super munter hitch is a really cheap way to get into rappelling and it's a good hitch to know anyways. There are various animations and videos showing how to do it and this video shows it in action rappelling:
On the tag/brake end of the rope, I use an autoblock, attached via a carabiner to one lineman loop (depending on left or right handed) and appropriately sized (diameter/length) for the rope I'm rappelling on so you don't have to rely on wrapping around your leg or pulling up on the rope, tying off, etc. to brake for removing steps and platforms.
The cost is: the rope you want to use, 1 or 2 carabiners depending on your use of autoblock and the autoblock.
Obviously only try this method if you feel safe to do so and you've practiced the hitch/descent at a safe height you've determined won't cause injury!