As for Texas, it still sounds like a good idea to drive to Laredo (as, according to the Tax Accessor website, you need to go to the county in which you "reside" and our mailing address is in Webb county) to register the cars in order to get Texas plates. It also makes sense to get a Texas DL to complete the CA "purge" while we are there.
I think you are over-thinking this. As Esperanza says, look into South Dakota plates if you need current plates to drive in the United States. Many do that here and you can do it without ever going to South Dakota. If you donīt plan to drive in the states, you do not need current plates. My pickup truck has California plates that expired in 2002 and the Mexican authorities do not care about this as long as my import papers and immigration status are in order.
About the driverīs license. If you have some time left on your California driverīs license, that is sufficient for driving legally here in Mexico and in the United States. If you are going to get a new driverīs license, get a Jalisco driverīs license. You can take the simple test in English at the traffic office in Riberas del Pillar and the license is good for four years. The fact that you are still driving on a California license is not an issue when it comes to any state income tax liability you may incur in California. Relax. They canīt touch you.
Two things I would do: Cancel my California voterīs registration telling them in writing I now reside out of the United States. Notify the DMV you no longer reside in California or the United States.
Some might argue with those points. If so, I will say why I think you should do those two things.
(This post was edited by Bubba on Feb 3, 2007, 9:00 AM)