a tube with housing the full distance isn't generally known to rattle.
You would have to get housing stops to line up in a straight line with no bend at the end of the housing or it's going to suffer from poor cable performance. So you probably will not be able to have a good entrance and exit location. I think most of the bikes that just had housing stops at the ends had the entry/exit in a straight line. Think of it as a couple of stops on the top tube, only inside, to see what I mean. The bikes like that had a very high failure rate.