In order to answer your question I need to know what exactly is "everything" that needs to be replaced. You need to be aware that when a person purchases a home that has been lived in there are always issues due to the home's age.One does not get a used home that is under a warrantly like brand new construction. I suggest that you consult with a real estate attorney to discuss what the problems are that you have now discovered with the home your purchased and if such are major issues or not, for example a cracked window. The other issue to be explored is whether or not the inspector or the seller should have disclosed the problems that you are now having with the home you purchased.