A recent trend here in Alaska is equipment rental stores will not allow rented equipment to be hauled on any trailer not equipped with trailer tires, and going a little further, they will not allow equipment to be hauled on any trailer they deem unfit for hauling. Unfit being defined by them, not by any regulation or law. Some see this as a result of attornies suing anyone for frivolous purposes, others see it as rental companies wanting to increase revenues by making sure they get delivery fees
If you have no plans to haul rental equipment this will not be an issue. Food for thought. Good luck!