Near a major airport hub, with a high frequency of low-cost flights to various gambling destinations. If 50% or more of your income comes from AP, you probably put in a reasonable amount of volume, which could heat you up if all of that action is from within a small, isolated region. It would be a shame to invest in a move to somewhere out of the way just because there's a good game nearby. Traveling to various casinos throughout the country may help to delay heat, but flights may not be so cheap from the middle of nowhere, which is often where the "best" (depending on your needs) games are.