DH is a tradesman and has finished job. The customer is refusing to pay and it's quite obvious now that this was always his intention. He has admitted that there is no problem with the work but he can't afford it and never could but it needed doing. DH is out ££££ on materials and paying his employees.
I'm just so sick of tradespeople being treated like this, you wouldn't believe how common it is. There is basically no chance of him ever seeing that money.
How would you like to go to work for a week and then have your company say that they've decided not to pay you? Please do not hire someone if you can't pay them.