One of the biggest risks to any conversion plan is the data or content migration.  This requires expertise in both the old and new application and data structures.  This usually takes lots of development and lots of trial and error.  Worse, the cost and risk are for one time conversion projects.  This is little residual value that the company or team retains from the knowledge gained during this process.
The Drupal Professionals have converted Millions of legacy CMS records into Drupal.  We have the tools and experience to control the cost and timeline risk to your Drupal project.  Let us take on the project risk of converting your legacy data, while you focus your team on learning Drupal.  Email us at: pros@thedrupalpros.com