The old saying where there's a will there's a way applies here. Figure out where you want to mount the cameras and then determine all possible access points to those areas to run cable. In some cases even cathedral ceilings have enough access space to run a cable but you might have to fish it through with a long fiberglass rod made for that purpose or some other method. Just be creative in your planning. Also consider mounting the cameras on a pole away from the house...that's what I did and it gives me a full parameter view. Not an easy install but the results are worth the effort.