You need db_owner
if you are going to create the database though the Project Manager. Also, when using Forms additional tables are created into the database, so you will need permission for this.
All the best,
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items