We would like to put in a window in our basement, so that the bathroom has a little of natural light, but more importantly for ventilation. DH thinks the cost would be extortionate, as it would involve digging down, and reinforcing the land back securely so that a window could be installed. He also thinks that all the waste pipes run along that wall and it would be impossible to do. Have you had to do this and was it worth it? Any advice would be welcomed on this as we are at loggerheads.