Undercoat paint to internal

We gave it about 4 weeks drying out before i moved in the painter, it was a lad from down home and my younger brother came up to do it! 16, 5 litre buckets of dulux white emulsion matt as it was going through a sprayer the painter said it should be a good quality paint, he finished coated all ceilings and one coat to all walls took him two days and cost me €400 for labour, the paint cost €600 and i hired the sprayer from frahers in dungarven for €70 a day, fantastic machine does a great job. The sockets or rads were not on at this stage so it was just a case of walk in and spray just cover windows with cardboard! No second fix plumbing or carpentry in the way either so that speeds the whole lot up.