It can cost anywhere from $10 to $200, depending on the size and weight of your TV. Mounting a TV to the wall is a fairly simple process, but it's always best to have a professional do it. If you're not comfortable doing it yourself, be sure to ask your local electronics store about hiring someone to do it for you.TV mounts don't necessarily ruin walls, but they can if they're not installed properly. Make sure you use a mount that's designed for your specific TV and that you follow the instructions carefully. Also, be sure to use appropriate anchors and screws in order to securely attach the mount to the wall.

It depends on the type of mount you get. Basic mounts start at around $20, while more complex mounts with features like automatic tilting and cable management can cost upwards of $200. Whether or not a TV mount damages walls depends on the type of mount and how it's installed. Some mounts use screws that go directly into the wall, which can damage walls over time. Other mounts use hooks or brackets that attach to the TV itself, which don't damage walls. If you're worried about damaging your walls, ask a professional installer for advice.