Ok, so I am just conveying my experience in installing the quintessential tool that is drush. I work at Kalamuna and I provide support to a majority of our clients. I am constantly having to move sites around from server to server, platform to platform, etc.
One of the biggest challenges I faced early on (and still do) is how do I get drush to install on a certain server? Some are very easy, some are great because they come with drush, but most are not.