Towards the end of 2011, we produced a course called "How to earn $4000 a month as a part-time Joomla developer". The main challenge for most people starting a business is making sales and this is especially difficult with web development. So many businesses already have a website and therefore don't see the need to build it again. However the proliferation of smartphones has changed everything. This post explains how to make money developing mobile-friendly Joomla websites.