I, Brian, RonHollingsworth, Emancipator, thank you for your help.
In my case I do have a link exchange in every site and I do have a huge VB.NET site with a different IP linking all my Mexico destinations sites.
About the diferent IP for each site that's going to be a problem because we have 30 sites and I don't think it's going to be good idea to have 30 diferents webhostings and the guys at serverbeach won't help to much in case I ask them for 26 more ip's.
I will work deeper on the backlinks I think that's all that matters when you have all your site optimize.
Right now I have a good position if you use the query (name of the city) weather e.g.
Hermosillo weather
Ensenada weather
rocky point weather
etc...
Thank you guys
