I put 2 sheets of mosaic over a basin once for a customer. ...didn't even charge him for it yet he rang up and complained about it !!!!
Said he didn't like the 2 tessera each side of the basin hanging over and could I come back and re do it as his wife can't live with it !!
If he's a paying customer and you can fit him in then no problem. ....jobs a job........but must admit after my experience I've gave up doing to many favours for people.
I wouldn't do it, I wouldn't even go look. I feel for his missus with her diagnosis but I can't help but think he is a chancer. I have no time for people like that. 4 years....... now he wants someone to finish it for him.