I would totally agree with @ stevieo the op was asking for sound advice about going self employed, getting your name around is key to your future existence if you have to go in low at the beginning ie £80-£90 a shift then so be it I would imagine it would be around the same as he is making per 5 days at the moment, the main thing the guy has to and will do, is getting used to pricing various types of work in which he would appear more than capable of undertaking, tbh its a big gamble he is thinking of taking on, I have been self employed since 1989, came off the tools in 2001, just priced and supervised, 2009 back on the tools after the crunch, so all I would say is fair play to him and if it does go tits up just go back and work for someone else at least he can say he gave it a go, if it was me in his boots I would stay where I was and just do as many homers as I got, pocket the money and enjoy life