Tequila parking.
We had an issue and looked for a mechanic in Tequila with no luck. Took the free road the 19k to Magdalena. At the entry to the toll road is a great Pemex that encourages parking, and has 24 hour security. No showers, but very nice lighting at night. There was even a couple that came in and put up a tent.
Until something better comes up, this is a great place to stay. There were two other moho's in who were headed to Tequila the next morning for tours.
If there had been something else available, we would have stayed in a park. However, it was too late in our opinion, to drive the 70 miles to Tepic.