I am thinking to migrate my forum website from vBulletin version 5.5.6 to xenForo 2.x. Is this possible ? Please let me know if there are any known challenges. Also do let me know what all points that needs to be considered before thinking of this migration.
There is an importer available for VB5 which will import all standard content.
If you are currently using a hosted version of VB then you will need to purchase a domain and hosting, and get a copy of the database and server files (attachments, avatars) to be able to do the import.