Question: I'm finding it incredibly hard to organise transportation for my trip, I am planning on going from Tehran and catch the night train to Esfahan and then catch another night train to Yazd and as far as I'm aware I cannot catch a train to Shiraz so I'll have to catch a bus and finally catch a plane back to Tehran.

Answer: For the information and reservation of the transportation in Iran you can check: http://www.uppersia.com/Iran-transport-services
And check the cheapest Iran tours at http://www.uppersia.com/Iran-tours