Just a quick note, I asked where you were in case you were south of t'border as I have just had a kitchen refurb and would have recommended my plasterer and builder.
I paid around �150 a day per expert excl.VAT.
I cannot see how �1500 for a skim would be justified at all unless you live in a HUGE house....
My plasterer charged �150 for a ceiling sized 4.2m x 3m and he did an exceptional job.
Do call the local council and see if they have anyone and check with these guys too......
http://www.ajatrustmark.co.uk/
Best of Luck
B. :-)