4 ft high with cages is a trivial size to move... you can do it! I have moved 3 footers in small cages in a car.... 4 ft cage was just a bit too tall and I didn't want the hassle of wrapping to lay them down. In a van or truck with 4 ft clearance you're laughing. Just jam something up against them so they don't fall over in transit. And even if they did, you will still have most of your plant.
