This guy is going to a lot of trouble he doesn't need to. I mean, the "non commercial" limitation is due to a law of the land. But all he has to do is convey that vehicle to a boat ramp and let it touch water from time to time. Now it is no longer a land vehicle; it is a maritime vessel, portaging overland between ports. It is now immune to the laws of the land, and the laws of the sea don't have a "non-commercial" limitation.

You do need to remove the "private" placard from your conveyance, and affix a "maritime" placard instead. And I'd be happy to ~~grift you~~ sell you such a placard.