Ummmm £75 to fit a cooker, it is a cable that attaches to the cooker point in the space, its a 5 min job,
£50 for the Washing machine and dishwasher, they will both be cold fill only ( they all seem to be that now ) So one connection to the washing machine valve, it just screws on, the waste will just fit on to a connection under the sink or on its own line, it will just push on ( warm the pipe up a little ) for extra peace of mind, fit a Jubilee clip around it
seriously, a decent handyman will do it in 1 hour