Seamus,
we just built in Co. Kildare, did it by direct labour, and total project took 11 months. We were complete novices but learnt a lot along the way (definitely recommend the Homebond book for anyone building). We spent a few months before starting the build getting different quotes from contractors for each aspect of the build, and once we decided on each contractor we gave them as much notice as possible as to when we would need them to do the work, so as to avoid delays, and that worked very well. We lived a few miles from the site, and thankfully my husband was in a position to be able to get home from work every evening before the contractors finished for the day, so was able to go over any issues, make decisions, and find out what materials needed to be ordered. During the day, he spent a lot of time ringing around various suppliers getting quotes and ordering materials & deliveries etc. Every evening at home was spent discussing what we needed to organise next, even things like managing the budget, paying bills, paying contractors takes a lot more time that you would think. Once the project advanced a bit, we also spent lots of evenings/weekends at the site doing all the manual work that would be done by a builder if you employed one to manage the entire build - stuff like clearing out rubble, preparation work for the next contractor to come onto the job. The project completely consumed both of us for an entire year and looking back on it now i actually can't believe how much we accomplished - when you're in the thick of it you just keep going and we did put ourselves under pressure to get it completed quickly rather than drag on for longer. So while i am glad we went the direct labour route ourselves, it only worked for us due to the time we were able to give to the project. Had circumstances been different and we didn't have the time available to dedicate to it, then there is no way we would have succeeded.
Cost wise, it worked out at EUR80 sq ft for builders finish (2,600 sq ft, high spec windows, stone facing, granite quoins and cills, 5 bathrooms, solar panels & wood pellet burner) or EUR102 sq ft to finished standard - incl kitchen, appliances, tiling, wooden floors, carpets, fireplaces, wardrobes, light fittings, painting etc).
Hope that helps.