Placing Reference Planes - First Script

I created my first script and a few questions. I have a generic family inserted in a project and I am able to add a reference plane to the family instance. The reference plane by default is placed on the center of the family. How do I get it to place on the right end of the family? Also, how can i offset the same reference plane by 1"? Or would it be best to place the two reference planes as a model group?

Is there any reason for right end?

After creating the line translate from center using Geometry.Translate(Direction and Distance).