Hi everyone, I am new so please excuse me on being a little out of touch. My boyfriend is going to hopefully be buying a house we found for cheap. It has a nice sized backyard but no back door, he wants to put one in though. It's a cinder block house so I was wondering if he could cut/bust though the back wall where he wants a door? Will it hurt the stability of the house or are there any risks/damages that can happen to the house? We have worked with his parents redoing houses, floors, stucco, paint and drywall, ect. but I just don't know about this. Please help!!