Three of us are considering riding to South America from the US but we need to break it up into annual 2 week sections. Mexico says your bike needs to be out of the country in 6 months. Costa Rica says 90 days. I have read a little about bonded warehouses. I would like to be able to leave my bike securely and legally in Southern Mexico or Costa Rica for a year, then come back and ride south. Can anyone give me some direction?