QUESTION: How much space is required for an installation?

Default
With Yellow Dog Linux v5.0, the default installation is roughly 3GB. This provides both the E17 and Gnome desktop environments with the applications showcased here.

Everything
A full installation of every package available on the Install DVD results in a little more than 8GB of data.

In between?
Between a very minimal install, the default and everything installs, there are a wide variety of options, customized to your needs.