Removal of tile-on-concrete from bathroom walls
 

I have 2 older bathrooms with tile set in concrete on the floor and 4
feet up the walls that I want to remodel. I had done this removal job
in our old house with basic hand tools (chisel, sledge, pry bar). The
memory is not a good one so I do not want to tackle these bathrooms
without the aid of a power tool to remove the wet bed and tile.

I am looking for any feedback from your experiences using these small
rotaty/combo hammer drills, some are called chippers, or is there a
more effective tool that can be rented.

Thanks
Greg