In one week of looking I have found a nice Honda ATV and a Volkswagen bug available locally.
1995 Volkswagen beetle for $2,000. US. Mechanically perfect with mostly new parts (brakes, clutch, shock absorbers, tires, even seats). The seller gave me a ride up the hill to make sure it is acceptable.
2009 Honda 250cc ATV. Only 1000 miles and in perfect condition. It was fun to ride and made it up the hill to my house with ease but it is scary. As I get older I seem to be accident prone. There is rarely a day goes by that I do not have a new scab. I think the ATV coupled with my accident "proneness" is a bad combination.
If I don't find a better vehicle/deal in Tepic, I think I will buy the VW.