The Mandalorians aren't my favorite SW-fraction by a long shot, but I think I would prefer my children being adopted by them (when left behind as orphans) then having to fend for themselves on their own. Other than the context of adoption, though, I'd be very sceptical. I wouldn't really want my children to join a group of a culture that's known for the constant battles between the different sub-groups. Not to mention that the Mandalorians worship battle a bit too much for my taste.
I suppose my children could find a family in them but I would still feel uncomfortable about it