A pre message (or other solution) should be provided when pressing build that shows the following information. Other solutions may be to present warnings when all views would not be created.
Warnings/Metrics to show before building are:
Tables in the Group which are not in the Source Database
Tables in the View Target database that would conflict with the views to be created
Values to chose
Count of Tables In group
Count of Views to be created (Tables in Group when also in Source Database and not a table in the View Database)
Count of Tables that conflict with the view build in the View Database