First the roof, then the electricity and plumbing, then the windows, if necessary to replace, the walls and the floor. Of course, you can't do ALL the pipes first if you need new fittings, so it works as needed depending on what is needed. Any home renovation project requires sound planning, but also a willingness to expect the unexpected. So how do you make sure you don't get stuck in a money pit? Before buying, always carry out an inspection to check the condition of the property.
This will be done by an external inspector who will provide a report on the necessary repairs and, from there, can estimate the associated costs. Everyone knows that this is not true, but this style of rapid remodeling chaired by simplistic hosts moves away from the central notion that renovating the house is complex and difficult.