Share 'Disc Golf: The Least Expensive Sport?'

In our store, a frequent topic of conversation is the great value that disc golf provides.  Low equipment cost, free to play at just about every course, etc.  I've been thinking about this for a while, and I'd like to hear you opinions.  Is there a less expensive sport than Disc Golf?    Obviously, you can paint a lot of scenarios about ways to spend money on a given endeavor, and lots of devout…