I am not a teacher, but I am friends with loads of teachers. Here is what I see and hear. Three people I know successfully changed course by doing this part time course with Hibernia. One said it was easy, two said it was hard. (Personally I think studying while working is always going to be hard).
I believe primary school teachers are suffering as much as anybody in the public sector at the moment, in terms of pay cuts. But it is important to realise that although things are bad now, they may have begun to have got better by the time you graduate from your course. I will finish by saying that it I for one think it is probably for the best to get this qualification while you are working in IT and then change job career after that if the opportunity arises. Good luck.