Originally Posted by
CLTPilot190
...There is no Space Positive travel to your base. If you were TDY in MIA or any other location besides your home base it is Positive Space and you get Per Diem.
This is correct. I'll add a couple points though. My Sim P was a retired Westie CKA and lived in PHX. He tried to bid TDYs whenever possible for the reasons posted above (ideally to LAS). Otherwise, you're on the hook for travel to, and lodging at GSW.
Additionally, as an employee you get D2/D1 privileges, but a you likely know, depending on where you're living that can still be a tough commute. They don't have JS privileges for the sake of commuting, but they are required a certain number of periodic JS observation rides (I forget the currency requirement) that can be used for occasional commuting.