I would tend to follow WRichey's suggestion.

How many cables need to pass through? You may be best to knock out one tile and replace with something more suitable. For what it's worth, I have had to go through tile several times, and I have found a masonary bit on a regular (read non-hammer) drill was the best bet.

Can you install on the tile wall? Its easy enough to use a small masonary bit on the grout and hang equipment with anchors.. of course, it depends on what else is on that wall.