Changed question:
I have decided to pick up my rental car after my 8:00 a.m. arriving flight. I will store my rollaboard in the rental car and go park it and then get my US 10:00 a.m. flight.
Is it easy to get from the Hertz rental facility to PHX parking? Is my plan doable, given the timing? (I am Gold with Hertz so shouldn't have to wait long or at all)