I broke down and bought a small, un-insulated safe for storage between apartment and house. I didn't have all that many firearms but it was fairly easy to drag it up the two flights of stairs and store in the apartment. I didn't transport in the safe when I moved, but at least they were somewhere locked up.
Pay it forward - Kids are the future.
Rifles are similar to boats and young women...there's no end to how much money you can pour into them without making them any more useful.