By the numbers of wrecked but still repairable cars I see being towed south on I-5 towards the border with "In Tow" scrawled on a piece of cardboard attached to the back window, it doesn't appear that folks in Mexico are having a tough time finding mechanics to work on cars that were never officially sold there, at least ICEVs.
For anything not involving the car's propulsion system, it would be trivially easy for a shade-tree mechanic to work on it. 12 v battery replacements, cabin filter changes, coolant, brake pads, even the transaxle fluid are no different to work on than an ICEV.
Parts may be a bit harder to come by, such as finding the exact 12 volt battery, or even the cabin filter. You may want to make arrangements with someone still back in the US to buy these parts and ship them to you if you can't get it locally. Coolant should be the same as you can get in any auto parts store.
But I would recommend having a Nissan dealer in the US take a look at it, to include the battery check, to make sure there's nothing wrong, and if there is to give you time to get it sorted before it gets shipped out. You may even want to grab some extra parts like cabin filters while you're there as they don't take up a lot of room.
Is Mexico on 120 or 240 volt power? If the latter you won't be able to use the OEM EVSE unless it's been modified to accept 240 volt power.
Blue Ocean 2012 Leaf SV, lost that 1st bar on 11/21/2015 at 26,435 miles.
Lease returned on 12/23/2015. Final LeafStat figures: 225 Gids, 17.44 kWH, SOC 91.89%, SOH 82.36%, 69.49% HX, 54.57 Ahr, battery temp 61.8 F
Now driving a 2015 VW eGolf SEL