/diy/ - Do It Yourself

Looking for advice anons. I'm in the process of buying a home. I was supposed to close tomorrow but at final walk through today I was told the owner let the furnace kick off during the polar vortex. It looks like some pipes froze and burst as there is water coming from a few spots in the baseboard heaters. I'm obviously not closing on a house like this. What is the average cost of repair for something like this? Would the entire plumbung system need to be inspected and if so what can I expect that to cost? I dont plan on paying it but I believe the seller is cash-poor at the moment and may pull the house from the market if the cost is too great.