From Titanic unneeded Qatar-grade airports north of Mexico City to 6 lane ultra landscaped airport entrances it is obvious that the Mexican government is as clueless as the US government about overland tourism.
Automobile manufacturers have big voices in Mexico City. They keep the federal government utterly paranoid about auto plants shutting down "because the influx of contraband pickup trucks threatens our very livelihood".
Make it simpler and easier Mr. New President. Make hologram decals for windshields that have 180 day time limits. Prepaid at a tasty discount. Good for vehicles without towed items.
Drive through tourist card centers at major crossings. For a service fee.
