An example of a high quality free forum that you can install and use with your Big Kahuna Hosting account is the “Anything & Everything Forum“.
It can easily be installed with the Installatron Feature found in your account’s Cpanel. The Big Kahuna Hosting Support Forum can help with questions you might have. If you would rather pay an expert a reasonable amount to handle installation and the look & Feel for you – look to Web Designs By Old Hippie.