read this,
http://curia.europa.eu/jcms/upload/docs ... 0032en.pdf
In the light of all the foregoing, the Court rules that where an EU citizen has, pursuant to and in conformity with the provisions of Directive 2004/38 relating to a right of residence for a period of longer than three months, created or strengthened a family life with a third-country national during genuine residence in a Member State other than that of which he is a national, the provisions of that directive apply by analogy where that EU citizen returns, with the family member in question, to his Member State of origin.
Your "residence" in Ireland has started. You are allowed to leave Ireland and go back as often as you like (with limits)and still maintain your residence there (keep paying the bills).
I have not heard of anyone using C-456/12 yet so it would be a difficult one and probably need an appeal but it should work.
You dont have to work, you could just be there as self-suficient for just over 3 months. That you have got married during that time is your evidence of "creating or strengthening a relationship". In fact there is no requirement to be working etc during the first 3 months, you have the right to just be there. Ok so from 3 months you can be self sufficint for a short while before going home. Your husband does not have to be there for 3 months at all, he could just join you in your last week of stay there. Oh, and get CSI (private medical insurance) before the end of your first 3 months if you are doing the next bit as self sufficient.
Soon as your husband is in Eire get him his PPS number. You could be back in blighty by end of July.