This is why I rent. :)
In the information age, where I am sure there are countless howto videos on DIY for unclogging pipes, they don't bring with them the experience to know which applies to your situation. So calling in a professional who has the experience to apply the knowledge to your situation is likely a better use of your time than trial and error.
This is why in a world full of DIY information, a services economy exists and is booming. What you may save in money, you end up paying for with your time.