If you'd read my posts properly mate you'd wouldn't have read £30 per hour. Its someone else who stated that figure. Mine was higher.
The post wasn't about 'telling others' as you put it, it was about enlightening those who just cant see a trades full potential for what it is, like yourself.
Absorb the information mate, accept some have been in this game longer than you, that some know more than you, have a more profitable business than you and some aren't as blinkered or closed minded as yourself. You'll progress nicely if you do.
Best of luck with it mate. It can't do you any harm.