Ideally, the Spurs will have decided which way they are going before the season ends, so that as soon as the final buzzer sounds versus Toronto in the season finale, the Spurs are in a position to go after their preferred candidate. What the Spurs don't want to happen is for the decision to hire or not hire a new coach to drag on into the offseason while they miss out on preferred candidates.
While I'm not exactly full of never ending trust for this FO, I do trust that they know this and will have made this decision by the time the season ends.
The only caveat to this will be that if Becky is their preferred candidate, it's probably best to get that hammered out now. I don't think Becky is the kind of person who would want to leave the Aces in a bad spot, so if she's going to come to the Spurs then it should probably be worked out with as much advance notice as possible. WNBA Training Camp opens just a few weeks after our season finale versus Toronto.