We replaced our fence last year as it was badly needing doing, it cost a small fortune and it was our neighbours fence. We checked with them that they were more than happy for us to do it. They are a elderly couple and they offered to pay half. The offer alone was enough, we wanted to replace the fence so we paid for it. I dont think your daughter should pay towards it, she needs to say that unfortunately she cant afford to - I think they will still go ahead and replace it, just trying to see if they can get something towards it.