Only one 10 year permit per person for one RV, having more will create more questions, are you selling one, did you sell one, why do you need two RV's in Mexico, etc, etc.
You can get one in your name and one in your spouses name, that is the only viable way, I have the 10 year for the RV and the toad for the end of a the year, then we go back to the U.S. and the wife gets the 180 for the beginning of the year for the toad, at the end of the 10 years she will apply for the next 10 years.
navegator