Traveller wanting to set up officially

I received an interesting enquiry via a friend who would like to employ an individual who until recently has been effectively a traveller. The person concerned is in a position to complete a number of jobs in the area with some well known companies. He wants to register as self employed or as a partnership. He has an address and is setting down roots. 

Has anyone had a similar situation? The individual just wants to work he isn't worried about about registering.