These instructions are useful if you are on a budget, have a lot of time and don’t mind walking the last mile to the rental location:
From any other terminal except Terminal A, go upstairs to the Orange Terminal Link area. Wait for the inter-Terminal shuttle to take you to Terminal A.
Once you arrive at Terminal A, Walk to the train station downstairs (the train will say Parker). Purchase your ticket (if it's afternoon, the ticket is only $1.50), and get on the train. Stay on the train until you arrive at the Bachmann Transit station.
There you will get off the Orange Line train and get on the Green Line train seemingly heading in the opposite direction. This is the Carrollton train.
Stay on the Carrollton train until you arrive at the Farmers Branch stop. If you board bus #488, the bus will not stop at the hotel. The closest stop is about 1 mile away. Be prepared to walk or take an Uber from where you get off.
Perhaps Sixt may consider a shuttle from DFW to this rental site to help ease rental loads from DFW. An Uber/ Lyft costs $35-$40.00 from DFW to this location.