Moving from Santa Fe, NM to Puerto Vallarta

Sorry to say Andy, but I would seriously  think about making major changes in your plans. Very few of us have moved  just about everything as you plan to do. It's not a trip for the faint of heart, and not all of the roads are  good.
Few are anything like Texas or California roads. I have driven down the tiny winding road into PV and was amazed that cars were able to pass each other at all. When a larger vehicle came by it stopped everything for a while, and caused some maneuvering back and forth. Last I saw there were no guard rails.

What would I do ? bring only what you can put in the car, Ship what is treasured family stuff you can't live without and can't get in your car. all we brought was electronics and Items not readily available in Mexico. Furniture like couches etc. can be purchased here, sometimes for much less than in the U.S. I recently bought a king sized posturapedic bed that was just like one in the U.S. only it was on sale for less. There is nothing I am sorry I left behind.  If you bring all of your things you can look forward to a trip that might include an extra thorough examination at the border

You can also buy things from Amazon Mx. and have them deliver the items to your door.

And You would have to pay me a lot of money to use a border crossing that had heavy traffic to Cd. Juarez, Cd. Chihuahua, Especially with a family and a loaded car.
I would drive to Arizona in Nogales and cross where I would not potentially be crossing into cartel territory, or encounter them after crossing. Also you have to go (west) that way to travel to PV anyway. It's a pretty straight shot down to PV from there and there are a number of toll roads. You definitely are better off on toll roads.

What sort of visa do you have ? you can only stay 180 days on a visitor visa.

I know this shoots holes in your plans, but it would be much safer.