Outdoor hose Bibb-questions

I keep having thoughts about this copper hose Bibb nipple assembly. I am thinking that I put the property in danger by going with this, and opting for copper instead of galvanized steel, and leaving it 3-4 inches long instead of much tighter to the siding. My main concern is freezing. I believe the galvanized is much thicker and could resist freezing better. But also the length of this from the house is an issue. But I wonder how much? My thought is that in below freezing conditions, this will definitely freeze if not rapidly dripped with a full stream. I am wondering the exact mechanics of how the freezing of this exterior 3-4 inch section would affect the water system. Would it burst right at the frozen section ? Or would it burst inside the house? Please let me know your thoughts on this. This is a rental property in Tallahasee, Florida and I believe it is best to not rely on tenants to drop faucets, cover things in the cold weather, etc. it seems to be getting down to about 22-25 degrees each year now. This hose bib has been like this for 1-2 years now.