Cassidy Caravans buyout offer is a holotape in Fallout: New Vegas.
Location
It is given to the Courier by Alice McLafferty during the quest You Can Depend on Me.
Transcript
This is an offer letter from Alice McLafferty at the Crimson Caravan Company to buyout Cassidy Caravans in its entirety - including equipment, brahmin, and existing trade contracts - from Cass