I am another who advocates for an SLE, instead of bringing her home.
It's better for strangers who know the score to impose discipline and hold her accountable for her behaviors. The better ones require their guests to be employed and self sustaining within X weeks.
If she is going to relapse, she will do so regardless of where she lives.
If she is going to stay clean, she will do so regardless of where she lives.
Recovery is 100% an inside job.