I don't think its good idea to travel to Mexico or Canada. Now, to process visa from canada, it takes at least a month but don't know about Mexico. One of the Guy who wants to renew his visa went to Mexico in morning and tried to came on same evening. Immigration people noticed that and he was deported to Nepal. It was a 2 years ago. one of my frn's frn was in same case in Canada and he was deported too. i think its too risk to get go Canada or Mexico to get visa. I would suggest not to go there. But take care.