Zas's info is generally solid - lay off him. Regardless who wouldn't operate under the assumption that Dooley won't be back next year. Given the staggering mountain of evidence what other conclusion can you come to?
As for how the process will play out, take a look at the Mike Hamilton way ..... and forget everything you think you know. Hart will have a successor locked up before Dooley is even shown the door.
For those obsessing over Kirby Smart, relax. While Kirby may be a good coach for someone, it won't be at Tennessee. Hart views this situation with 'urgency' (his words). That doesn't call for taking a risk on an assistant regardless of how good he is. Rather, he has to maximize his chances for success. And he does that by hiring a proven, established head coach and preferable one with a marquis name. When you have but one shot, you shoot for everything.
The only way money factors into this process is the amount of lost revenue that the AD will have if he doesn't act. Buyout is not an issue, nor is salary. Football is the engine for the entire AD. Hart has said as much repeatedly. When that's the case, you hire the best person you can to run it, regardless of cost.