IF you have a good support network where you are, I would stay for the 2 years until DS went to school. How far away would your DH have to move? My DH is in the ADF and I've had to move away from family support and I feel isolated at times. Before I got pregnant I was an Early Intervention, so I know how hard it is to find those services. Also, if your DS is coming so far, it would be a shame to waste it all - same goes for DH's study. At least give it a go and if it's all to hard you can move. In the meantime, I would investigate the services you would need to access if you move and put your name on the waiting list.

If you didn't have a child with special needs or any support network, the decision would be a lot easier, but imagine being in a city where you don't have any support, trying to deal on your own while DH is at work all day. I have a typically developing toddler and a few friends from play group, but being on my own with DS all day does my head in sometimes! If I lost my one day off (daycare on Tuesdays) I don't know what I would do!