For the most part, unless a DON is retiring, there is a "reason" the position is open to begin with. Usually, there are issues in the building to go along with it, whether it is survey related, staffing, etc. I have been traveling and doing interim DON work in facilities that can not find a DON. Each facility has/had issues.
If you decide to stay, start by looking at your staffing. How is the attendance of staff? Is it being monitored and are they held accountable? Then look at your policies and procedures. Are these current? Do they need work? Are they being followed? Does updated training for staff need to take place? Do you have a good management team under you that can be trusted to hold there own? This is not an end-all list, just a place to start.
As for ALF, there is less documentation. The DON in these facilities is more hands on and not in the office as much. ALF is more of a social model, where LTC is more of a medical model. Two different ballgames.