I just want to add some info I gathered from this and other threads for anyone else who has to do this.
You DO NOT Have to farm the rep on your Horde alt to get to Kul'Tiras. Just use the Iskaar turtle boat (Young Belvo). I saw this mentioned elsewhere but no specific instructions.
The easiest spot to get on the boat is in Grixxly Hills at 80.75, 29.38. Just sit in the ocean until it comes. I think a full loop is 20 minutes? After that it will go to Azsuna and then Kul'Tiras. Get off at Kul'Tiras and you can continue the Legend of Mechagon quest line without farming the Zandalari Empire, Drustvar or Vol'Dun reputations to Friendly.