Do you think that as an Edo Tensei he'd kill her or her heirs? Or would just ignore them for the sake of grattitude? Or make a little speech about her great feats and how she tried to help him?
And what if the saviour is a non Uchiha? Like: someone that out of kindness tried to magically save Izuna?
And yeah. I think that maybe Madara was on a mission. But Hashirama was clearly near his home.
Inviting the saviour over? Like take him/her to a prestigious place in a political meeting?
I think they weren't nomads, but I think they didn't have like mansions.