I wonder if it's because she could not have physically walked off and ended up somewhere near her house on her own? If someone went to the trouble of taking her from her home, then would they really leave her just right there somewhere close by?
I think usually searches initially happen starting from the last known location the person was and then just extend out from there. That would be assuming the person left on foot and walked off and fell or something like that. If she isn't able to walk off at all, then having searches search that area seems like wasted resources. I am sure if they get a tip or have a suspect and possible locations to search, they can get the searchers back out in the area.
I am thinking this is likely more than one person because if she can't walk far on her own, then how would 1 person get her to go with them? If someone hurt her, they would have to carry her and if she is alive and they held a gun to her, how far could 1 person get her to walk even under duress? It seems they would have to carry her or if they harmed her in the house, someone would have to carry her or drag her? Would 1 person be able to do that and why would they take her if they harmed her in the house? So many questions here.
IMO