Drupal is not recommended because its learning curve is steep. Beginner will not get anywhere far with it. Joomla is easy to use compared to Drupal only to those who are familiar with web development.
The use of CMS largely depends on the type and nature of business. What kind of business is this? Will there be online ordering? Will there be lots of contents online? Will it be frequently updated?
Some home businesses can actually manage well with just 3 webpages so it really depends on several variables.
