This is how I plan my Vegas trips as well, to balance my rake to time-expected-lose ratio. I have no delusions of being a good poker player.
When I say "starting stack" below, I mean a player that is still holding at the starting stack. i.e. buy-in for T10,000 and you still have 10,000, you have "starting stack".
When starting stack = 16 BB, players trying to maintain fold equity will start to shove. When the starting stack = 6.25 BB, even the worst players will be shoving, but by then the good players are blindly calling them. Mind you, this is just a time on the clock. Many terrible players will fold 3 orbits with just 4 BB.
Of course, I built these ranges before the BBA became a thing. It is entirely possible that the 16 BB target is closer to the 32 BB range since you are effectively paying 2 BB every time you post. And like all things poker, the players will also have a net effect. Players at a WSOP event may shove sooner to double up or rebuy while their stacks are still good. Players at $400 buy-ins play better (thus maintain more fold equity) than players at $45 buy-ins (who will blind themselves out looking for a hand).