How many do you expect to be moving. I have very few hives, I moved them once with a hand truck and a 5x10 ft trailer. One load for the hives and 1 for supers to be added. Now a guy in our bee club may be more like what you want. He has a flatbed truck and a trailer for the forklift. He has his hives on pallets, I could be wrong but I think he told me he can carry 60 hives on a load. Maybe this will help.
Joe