Sounds like you need the services of a good lawyer. I would think there would be widespread implications in areas you haven't thought of. Some possibilities could be the need for a CDL license, the requirement to enter all weigh stations and be able to furnish manifests and commercial shipping documents, the need for special paperwork if you go to Canada or Mexico, etc.. I would also be very doubtful that you can get any type of non-commercial vehicle insurance and your liability requirements may be quite different than what you are used to. Time to move to the commercial world.