Can't really add much to the above suggestions,
However id like to say that being self employed isn't all its cracked up to be.
Theres a lot of hrs involved that you're not getting a wage for, paperwork, driving around, estimates and the like,
Ive lost count of the times ive stood measuring up and been thinking, nowt going to come of this as this guys only git me here ti show willing to the Mrs and the jobs not going to happen.
Or the customer comes back 6 months later wanting you to honour a quote an gears gone up by loads.
Then theres the non payers, never mind the tv programmes of cowboy builders, they should make ones on cowboy customers.
Anyway best if luck to ya lad and hope it all works out for him.
Jimmy.