This is a rather quick hit, as I'll expound on this point later (and many other random thoughts floating around in my head), but buying any software (excluding consumer software) is a lot like buying a puppy. Paying the $2K (or whatever you pay) is only the beginning - you'll need to take it to the doctor, buy all sorts of things to protect your house, and continue to feed it and nourish it. The initial license cost of software is only the first step.

This analogy also holds true for open source software; OSS software is as "free" as a free puppy is "free."