Dazmond,
Set your sights high mate.
Nevermind what they are doing, you do what you are happy with and charge what you think the job is worth.
I would never do a free clean unless one of my customers got me into more work and then i would look after them for looking after me.
The best advice i ever recieved was, always be dearer than your competitor, i couldnt work it out but believe me its true.