rober, from what you described, up here, they would never make it. with that said, jack would be the best beek for advice for your friend. yes, i would combine all 3 of them as a last ditch or hail mary attempt. not sure this will fly, but it's how we learn.
with some stores and no stores, as jack said your friend will have to feed the combined hive for winter months and hope for the best.
good luck to your friend.