on that amount of sq yards you should be able to get it done for around 18 - 20 a yard if its a soild floor (which i take it is ) marine ply is a over kill ,you could use osb board as the sub-floor and much cheaper aswell at 22 euro a sheet ,also the floor needs to acclimatise for 10-14 days before fitting in a new build and maybe more.
57 sheets of osb 18mm @ e22
3 rolls of 1000 guage polythene @ e15
7 boxes of express nails @20
3 boxes of floor nails @25
fitting @18 sqyard
skirting fitting for 300-400 maybe
i wouldnt get anybody doing it on a day rate, if the job takes 5 dayes ,it will take 8 days then and a good carpenter will want anything from 250-300 maybe a day . hope it helps