http://www.irishrail.ie/your_journey...oport%2009.pdf
Would highly recommend you choose to live nearer Dublin, no further south than Greystones which has a decent large free car park and a reasonably frequent service to Dublin
Services on the Gorey line are sparse, slow and monthly tickets are overpriced. Last train out of Dublin is 18:35 currently, might be 19:15 as of October