Gazzasp8 thats the way to do it big fella - got a call this morning to price a reasonably large detached house (in a posh area not far from here), took a look round the house, £15, HHHUUUUGGGGEEEE conservatory, £35, she nearly broke my arm shaking my hand when I told here, she had thought about £80 for the lot.
Then I mentioned the conservatory roof - £200!! She nearly fainted, thought I would have asked £300 or more.
So a very nice £250 every other month.
She got my number from another customer who I charge £5 for and was so impressed she rang me straight away.
The moral of the story is this - do a premium job for EVERY customer and the word will get round, remember - SNOWBALL.