Week one finals scheduling will be interesting given Freo and WC are most likely going to finish one and two (or two and one).
I believe the typical slots for the four games (2 Qualifying Finals and 2 Elimination Finals) are Friday night, Sat afternoon, Sat night, Sunday afternoon.
Normally the QFs tend to be earlier in the weekend, from memory. Given there won't be two games at Subi on the Saturday, one of the QFs will be on the Friday night or the Sunday arvo and the other on the Saturday, with my tip being Saturday afternoon (to allow the travelling team time to get home and because there could be an all Victorian EF).
The Friday night slot will be interesting given that all likely top 4 teams (except Richmond and Norf) would've played on the Saturday in R23 (six day break) and three of the four (WC, Syd, Freo) would have also played on the Sunday in R22 (consecutive six day breaks). Not sure either of the WA teams would want a Friday night QF.
The logical option would be for whoever finishes 2nd to play the Friday night qualifying final. Consider it an extra perk to finishing top.