One of my good mates is a top notch tree surgeon. He did it a few years ago but then joined my'firm'. He is giving it up now & going back to the trees!
He reckons he can make enough in the summer six months to see him through the next six. He no longer needs to work shifts and is his own boss.
I think I may join him, and trust me £500 a week should read £500 a day!