I just started this game, how do I set/change my location? Thank you ahead of time! 
Welcome to the game. It’s lots of fun.
You choose your Stable location when you set up your Stable (best locations are near the NY tracks, especially Aqueduct or Belmont). You want to choose a location where you won’t have to spend a lot of money shipping your horses to tracks to race.
To the best of my knowledge, it isn’t easy to change Stable location once you are set up. I believe Shanthi would need to do it manually. For a new stable like yours, it might not be as difficult, however, for a large Stable like mine, I suspect it would take her quite a while to do.
Thank you! C: