Chri5 - i totally agree with you, but its not my house or my money. The situation is young couple with baby, wanting to get a house rather than their flat, have bough a renovation project to get the space they need at a cost they can afford.
So its having a full new plumbing job, new joists and flooring on ground floor because of rot, new windows, new doors, new electrics etc etc You can only spread a fixed amount so far.