Painting Ceilings

I started paintingthe downstairs ceiings yesterday evening - after getting a couple of prices from painters. The first one was for 2500 to paint downstairs inside and to varnish the doors skirting architrave in the house (15 doors). I thought that was high enough - then another one came in with 5000 !!!. I wasn't too happy with the first one - he has only been doing it 3 months and he didn't seem to sure about what he would use in terms of paint. I looked at a house he had done and I wouldn't be happy paying 2500 for his work. So - I having a go myself and am off to do some now.