Add a wired genie later or now - DirecTV

We are considering switching from Uverse to DTV. We have a daughter in college and we may get a genie for her room when she is home from college. Should I go ahead and get the extra genie now or wait until she is home? I'm thinking I won't get the genie for free if I add it to the home later as opposed to getting it as part of the new install.

This question, "Add a wired genie later or now," is about DirecTV channels, programming, equipment, and sports.