I don't intend to sound discouraging but I think this is a really bad idea just now. Economically Ireland has slowed down a lot, many people have lost their jobs, especially in construction. I'd say carpentry is particularly badly affected, and because Ireland is so small, the effects are felt much quicker than in the UK.
I'm sorry to say you and your partner, might very likely not find work here, despite your best efforts. A lot of jobs in Ireland are got through contacts and word of mouth, and being out of Ireland for years means you're at a disadvantage straight away.
The credit crunch is here, so my advice is if you have a job, small business or cash flow income of any kind do not give it up under any circumstances. Unless you're planning to retire, downshift your life, etc..... Far away hills, even the ones in Ireland, are not always greener.