I wouldnt go near this one. Job is mostly done by someone else, lots of appliances purchased and delivered by somebody else. Lots of places where previous player could have left landmines. Add in a client that is already distressed, drained of funds and willing to contact media if things don't go as expected as a capper.This would be a great way to market your business, come in and save the day.
If mp and dad have a higher risk tolerance, it may be worth the chat and go T&E. The first day or two would just be inspecting what has been done before doing work that further buries issues.