We’re not talking about the cost of migration tools. We’re not talking about the servers that you’ll have to buy or even the licensing. The true cost of changing to SharePoint is the people costs.
The costs are in the cost of the change itself. They don’t change from product-to-product, but the cost of change is real. Let’s take a look at what it takes to keep from being a victim of the trough of reduced productivity.
http://www.sharepointpromag.com/blog/sharepoint-pro-by-admins-devs-industry-observers-23/sharepoint/cost-changing-sharepoint-142505 [Article removed]