Sounds too low a rate to be worth it. I haven't done the calcs, but looked at it before with a much higher daily rate and i ruled it out. You'll end up staying in a hostel, or a 2 hour commute.
What's your work background / experience? Surely you can get something in Dublin.
GBP325 is a low daily rate. You could earn more than that on daily rates in Dublin especially in finance. I don't think the financial compensation would be enough to make the effort worthwhile. Unless of course it is a choice between that and unemployment. Would they let you work remotely for 1-2 days a week? What area of finance is it?