Hi, we got a freelancer to paint our 4 room flat. He charging us $700(excluding the paint). I think its reasonable, cos we have 4 diff colour for each rooms. 2 diff colour for the walls, another colour for cornice and another colour for the ceiling. He needs to do lots of taping and covering to do a clean job. If you gonna paint all same colour for the wall, cornice and ceiling, i think you can save lots of money by painting urself. however, if you have diff colours for walls, cornice n ceiling like mine... i think its advisable to get professional's help.