could you do a double bedroom in a day? with ceiling? if you can then you won't be far off on that full house. if you do 1 wall per set your wasting your time. i worked on a site once with this lad who'd just finished a plastering course and was learning to be a lecturer ??? he would skim 1 wall per set, took him 2 weeks to skim out a 2 bed flat. and no, i'm not joking.