Sorry to hear about the issues your daughter is having. You should check with your realtor and see if they had a sellers disclosure. See if any items were listed as broken or not working. Also see if this home was sold AS-IS. The home inspector should have tested the A/C and checked the water lines, but I don't know if they are held liable for missing anything. The other option your daughter would have is to get a renovation loan to repair what's broken as well as do any other renovations or upgrades. I can provide you the information you or your daughter may need if that is the route you would like to go. You can go to my website and download a free renovation guide or contact me directly with any questions. Good Luck.