...you should:
a) Show up when you say you will
b) Do what you said you would
c) In the time-frame agreed
c) For the agreed-upon price (or if this isn't possible, flagging it and the problem and renegotiating)
EIGHT different people for a load of different jobs (renovating flat). ONE of those eight has been a star. The rest? May a seagull divebomb them every day for a week.