The whole area of virtualisation is complex and particularly technical. As a result there will be costs associated to this as it will require a specialist company in order to implement, install and support such a system. As a result, you must make completely sure that the benefits outweigh the potential costs.
Virtualisation is of particular value to larger companies with many employees and multiple servers. However there are also some excellent systems for the smaller business but care and diligence should be taken before making a purchase.