Yup, didnt mean to imply that getting a Mx drivers license was automatic when your USA one expires.. Its an easy process to get the Mx one. You need one or the other which is still valid. And you can have both at the same time. I dont know about international drivers licenses.
Getting the TIP at the border is not a big deal and takes an hour or less depending. But you have to know where to go for the office after you cross the border.
And likewise, since this is an expat forum I assumed that someone was crossing the border to stay for an extended period, not a short term tourist.
That's a pretty good assumption, although in reality (especially out here in the Tijuana-Rosarito-Ensenada region) there are many, MANY "expats" living here--close to the US border--for extended periods, without ever getting a 6-month FMM (tourist visa).
So they also don't get TIPs for their vehicles.
This is because very few United States plated vehicles are stopped at the border coming into Mexico, and even when they are, it's almost always to see if they are bringing in large amounts of merchandise that can be taxed.
Only if they're asked where they are going and they reply that their destination is in the interior of Mexico will they be directed to pull over and get a TIP.
And if at some point they haven't declared that they are driving into the interior but they end up doing so, then they are subject to being stopped to get a TIP, and they also run the risk of fines and even deportation for traveling into the interior without an FMM if they don't have one.
I know one woman who has lived in Rosarito for 9 years now, and not only doesn't she ever get a TIP for her California plated car (she drives back and forth across the border a couple times a month) but even though she has been stopped numerous times for inspection, she has never been directed to pull over and get either a TIP or an FMM tourist visa when she tells them that her destination is her condo in Rosarito.
There are rumors that México may finally be tightening up on perpetual tourism soon, but as yet there are no widespread reports of it happening at the San Ysidro or Otay Mesa border crossings.
Walking across the border into Mexico is a different situation, where a passport and an FMM are required.
But of course if you are walking across the border you aren't bringing in a vehicle, so there's definitely not a TIP issued then