I don't need to argue with you, you can be right all you want with your vehicle. I'll be right with mine, I have all the docs I need to keep me legal. But you know as well as I do that that the Feds (and Texas) refer to "passengers and property" as something moved for hire, for profit, or in furtherance of a business. How you decided to enforce it is possibly a different story. I deal with enough Fed and State LEOs every day to know they enforce their interpretation of the laws, often even in the face of clear evidence that they are mistaken. And I am familiar with the term commerce, thanks. Not sure you know what I was referring to there.
And just for the fun of it, since I'm not doing anything else, I just called the State of Texas DMV, again. Not the county. And once again, with 2 clerks and a Super/manager on the phone, was told that if it is not being used in a commercial manner (as I described my truck- registered as a truck>1ton being used to pull a 5th wheel RV or horse trailer for personal recreation-and no, I don't make money with my horses), then it is NOT a CMV (confirmed that the terms mentioned above are as I described them in accordance with Fed laws) and does not need to be registered as a CMV of any type, and does not require a CDL. But you do you.