This is an interesting one, because there is a limited amount of businesses doing bulk registrations of their vehicles in NJ. I do registrations for my dad's trucking company with 300 trailers and long gave up trying to do it in NJ. Prices for title+plates and inspection requirements coupled with a three vehicle limit for bulk work at the DMV (something I'm not even sure is still available since they've moved to the online appointment thing which says no bulk work) make it too difficult. Why deal with that when states like Oklahoma, Maine, and Vermont (to name a few) do mail in service for out of state people with rates that are a fraction of the price. The only other thing dmvs need is licensing and with that you are stuck in NJ, and in the end, the rigamarole of coming, being sent away, having to explain to the sheriff who is only at the door when you arrive back, and the countless hours of counter workers calling IT for some random issue seriously needs improving, but is manageable for the once every four years that something happens.